tol Novel Phonetic Name Matching Algorithm with a Statistical Ontology for Analysing Names Given in Accordance with Thai Astrology By Published On :: Full Article
tol Ontology-based Collaborative Inter-organizational Knowledge Management Network By Published On :: Full Article
tol Crisis and Disaster Situations on Social Media Streams: An Ontology-Based Knowledge Harvesting Approach By Published On :: 2019-10-20 Aim/Purpose: Vis-à-vis management of crisis and disaster situations, this paper focuses on important use cases of social media functions, such as information collection & dissemination, disaster event identification & monitoring, collaborative problem-solving mechanism, and decision-making process. With the prolific utilization of disaster-based ontological framework, a strong disambiguation system is realized, which further enhances the searching capabilities of the user request and provides a solution of unambiguous in nature. Background: Even though social media is information-rich, it has created a challenge for deriving a decision in critical crisis-related cases. In order to make the whole process effective and avail quality decision making, sufficiently clear semantics of such information is necessary, which can be supplemented through employing semantic web technologies. Methodology: This paper evolves a disaster ontology-based system availing a framework model for monitoring uses of social media during risk and crisis-related events. The proposed system monitors a discussion thread discovering whether it has reached its peak or decline after its root in the social forum like Twitter. The content in social media can be accessed through two typical ways: Search Application Program Interfaces (APIs) and Streaming APIs. These two kinds of API processes can be used interchangeably. News content may be filtered by time, geographical region, keyword occurrence and availability ratio. With the support of disaster ontology, domain knowledge extraction and comparison against all possible concepts are availed. Besides, the proposed method makes use of SPARQL to disambiguate the query and yield the results which produce high precision. Contribution: The model provides for the collection of crisis-related temporal data and decision making through semantic mapping of entities over concepts in a disaster ontology we developed, thereby disambiguating potential named entities. Results of empirical testing and analysis indicate that the proposed model outperforms similar other models. Findings: Crucial findings of this research lie in three aspects: (1) Twitter streams and conventional news media tend to offer almost similar types of news coverage for a specified event, but the rate of distribution among topics/categories differs. (2) On specific events such as disaster, crisis or any emergency situations, the volume of information that has been accumulated between the two news media stands divergent and filtering the most potential information poses a challenging task. (3) Relational mapping/co-occurrence of terms has been well designed for conventional news media, but due to shortness and sparseness of tweets, there remains a bottleneck for researchers. Recommendations for Practitioners: Though metadata avails collaborative details of news content and it has been conventionally used in many areas like information retrieval, natural language processing, and pattern recognition, there is still a lack of fulfillment in semantic aspects of data. Hence, the pervasive use of ontology is highly suggested that build semantic-oriented metadata for concept-based modeling, information flow searching and knowledge exchange. Recommendation for Researchers: The strong recommendation for researchers is that instead of heavily relying on conventional Information Retrieval (IR) systems, one can focus more on ontology for improving the accuracy rate and thereby reducing ambiguous terms persisting in the result sets. In order to harness the potential information to derive the hidden facts, this research recommends clustering the information from diverse sources rather than pruning a single news source. It is advisable to use a domain ontology to segregate the entities which pose ambiguity over other candidate sets thus strengthening the outcome. Impact on Society: The objective of this research is to provide informative summarization of happenings such as crisis, disaster, emergency and havoc-based situations in the real world. A system is proposed which provides the summarized views of such happenings and corroborates the news by interrelating with one another. Its major task is to monitor the events which are very booming and deemed important from a crowd’s perspective. Future Research: In the future, one shall strive to help to summarize and to visualize the potential information which is ranked high by the model. Full Article
tol Ontology-Driven E-Learning System Based on Roles and Activities for Thai Learning Environment By Published On :: Full Article
tol An Ontology to Automate Learning Scenarios? An Approach to its Knowledge Domain By Published On :: Full Article
tol Ontology of Learning Objects Repository for Pedagogical Knowledge Sharing By Published On :: Full Article
tol An Assistant for Loading Learning Object Metadata: An Ontology Based Approach By Published On :: Full Article
tol Internal Data Market Services: An Ontology-Based Architecture and Its Evaluation By Published On :: Full Article
tol Ontology Matching and Repair Based on Semantic Association and Probabilistic Logic By search.ieice.org Published On :: Nan WU,Xiaocong LAI,Mei CHEN,Ying PAN, Vol.E107-D, No.11, pp.1433-1443With the development of the Semantic Web, an increasing number of researchers are utilizing ontology technology to construct domain ontology. Since there is no unified construction standard, ontology heterogeneity occurs. The ontology matching method can fuse heterogeneous ontologies, which realizes the interoperability between knowledge and associates to more relevant semantic information. In the case of differences between ontologies, how to reduce false matching and unsuccessful matching is a critical problem to be solved. Moreover, as the number of ontologies increases, the semantic relationship between ontologies becomes increasingly complex. Nevertheless, the current methods that solely find the similarity of names between concepts are no longer sufficient. Consequently, this paper proposes an ontology matching method based on semantic association. Accurate matching pairs are discovered by existing semantic knowledge, and then the potential semantic associations between concepts are mined according to the characteristics of the contextual structure. The matching method can better carry out matching work based on reliable knowledge. In addition, this paper introduces a probabilistic logic repair method, which can detect and repair the conflict of matching results, to enhance the availability and reliability of matching results. The experimental results show that the proposed method effectively improves the quality of matching between ontologies and saves time on repairing incorrect matching pairs. Besides, compared with the existing ontology matching systems, the proposed method has better stability. Publication Date: 2024/11/01 Full Article
tol Archon Firearms Type B 9mm Pistol – Video Review By www.ammoland.com Published On :: Sat, 09 Nov 2024 15:00:33 +0000 Archon Firearms and the Type B are far from the typical company or product and it shows. Video tabletop and shooting impressions review. Full Article Firearm News Gun Reviews Graham Baates
tol RTAC Large Lasercut MOLLE Backpack w/ Pistol Retention System $20.99 75%+ OFF! CODE By www.ammoland.com Published On :: Sat, 09 Nov 2024 15:05:02 +0000 RTAC Large Lasercut MOLLE Backpack with a Pistol Retention System is not just $20.99 after a sale and coupon code at check out. That is 75%+ off... Full Article Gun Deals Ammunition Depot Back Packs Daily Gun Deals Tactical Gear
tol LT ED GLOCK 19 Gen 3 “Trump 2024 Mug Shot” 9mm Pistol $569.99!! By www.ammoland.com Published On :: Tue, 12 Nov 2024 14:33:27 +0000 Merica! Celebrate the landslide trump election win with a limited edition GLOCK 19 Gen 3 "Trump 2024 Mug Shot" 9mm Pistol, now at just $569.99. Full Article Gun Deals 9mm Pistol Daily Gun Deals GLOCK GrabaGun Limited Editions
tol Will Zindagi Tamasha dig deep into the intolerance in our society? By tribune.com.pk Published On :: Tue, 16 Jun 20 10:43:58 +0500 The movie will perhaps force us to ask questions about topics usually reserved for the back pages of a newspaper Full Article The Videoscope
tol Pod Rods: Most stolen vehicles, Camry named Daytona 500 Pace Car By news.jacksonville.com Published On :: Thu, 25 Aug 2011 12:00:00 -0500 Plus: Cadillac Ciel Concept, weekend car events and more. Full Article Pod Rods
tol Death toll of Israeli strikes on UN operated school reaches 18 By tribune.com.pk Published On :: Thu, 12 Sep 24 05:13:39 +0500 Women, children among casualties with six of the victims being staff members of UNRWA including the shelter's manager Full Article World
tol Death toll from Typhoon Yagi in Vietnam reaches 226 By tribune.com.pk Published On :: Thu, 12 Sep 24 15:29:03 +0500 More than 100 people remain missing, while some 800 people have been injured Full Article World
tol Piracy Shield Crisis Erupts as AGCOM Board Member Slams Huge Toll on Resources By torrentfreak.com Published On :: Mon, 04 Nov 2024 12:53:02 +0000 Critics of Italy's Piracy Shield are not difficult to find but, with its powerful and influential proponents rarely far away, getting heard is a considerable challenge. Not to mention getting anything done. After calling for the platform's suspension and meeting resistance in the wake of the recent Google Drive blocking blunder, AGCOM board member Elisa Giomi has gone public with a laundry list of concerns. It pulls zero punches. From: TF, for the latest news on copyright battles, piracy and more. Full Article Anti-Piracy Site Blocking AGCOM Cloudflare DAZN google italy Piracy Shield Serie A
tol [UK] New store opening in Bristol tomorrow By brickset.com Published On :: Wed, 06 Nov 2024 22:00:00 GMT The UK's latest brand store, at Cribbs Causeway shopping centre near Bristol, opens at 10am tomorrow. It's a bit of a mystery why the location was chosen for a new store when it's so close to the branch in the centre of the city, particularly as there are other parts of the country crying out for one, but at least it's much easier to get to by car, being just off the M5, junction 17. Those visiting the store on or before the 10th of November will receive 40528 LEGO Brand Retail Store on purchases over £120. The shop, which is near Boots on the upper floor of the centre, hosted a press/AFOL event this evening at which our Bristol-based correspondent Emily took the photos of the inside that you'll find after the break. Continue reading »© 2024 Brickset.com. Republication prohibited without prior permission. Full Article
tol Biden administration's 'dismal' China policy faulted on Capitol Hill By www.washingtontimes.com Published On :: Wed, 31 Jul 2024 15:15:38 -0400 The Biden administration has failed to win the strategic competition with China through ineffective policies toward Beijing, the senior Republican on the Senate Foreign Relations Committee said this week. Full Article
tol Sauber has signed Brazilian driver Gabriel Bortoleto to partner Nico Hulkenberg in F1 for 2025 By www.washingtontimes.com Published On :: Wed, 06 Nov 2024 11:57:47 -0500 Sauber has signed 20-year-old Brazilian driver Gabriel Bortoleto to make his debut in Formula 1 next year as Nico Hulkenberg's teammate. Full Article
tol What a Yankees fan recently told Pedro Martinez that became ‘personal’ By www.boston.com Published On :: Tue, 12 Nov 2024 19:12:05 +0000 “Go out there, represent the Red Sox, and become a challenge to the Yankees.” The post What a Yankees fan recently told Pedro Martinez that became ‘personal’ appeared first on Boston.com. Full Article Sports Baseball David Ortiz MLB Red Sox Sports News World Series
tol Kuemmerlen, M., S. Stoll & P. Haase By www.eubon.eu Published On :: Fri, 05 May 2017 16:48:42 +0300 Full Article Events
tol The Case of the Stolen Fortune Cookie Fortunes By www.bbc.co.uk Published On :: Sat, 23 Dec 2017 01:30:00 +0000 "Some men dream of fortunes. Others dream of cookies." This is a real fortune cookie fortune. It would be a prescient fortune for Yongsik Lee. He invented the fully automatic fortune cookie machine in the early 1980s and built a business on his invention. The Korean immigrant sold fortune cookie machines and fortunes to companies all over the US. It was a good business until one day, one of his employees stole his fortunes and his customers. We get to the bottom of a theft that forever changed Yongsik Lee's life. (Image: Fortune cookies on display at The Ritz Carlton in Miami Beach, Florida. Credit: Neilson Barnard/Getty Images) Full Article
tol Untold Afghanistan By www.bbc.co.uk Published On :: Sat, 15 Sep 2018 01:30:00 +0000 In the early 2000’s the US helped fund Afghanistan's first private university. It was part of an effort to help rebuild Afghanistan's education system. Over time, the American University of Afghanistan has become a symbol of hope for many young Afghan men and women who dream about higher education. But that very hope has also made those students, and their campus in Kabul, targets for extremists.Also: First Lieutenant, Erica MacSwan, prepares for her deployment to Afghanistan; Lt. MacSwan recalls her family’s personal experience with the 9/11 attacks; and we step inside a fashion boutique in the heart of Kabul.(Two years after the attack on the American University in Kabul, school officials have stepped up security. That means the campus has the look and feel of a military compound. Credit: Farzanah Wahidy/PRI) Full Article
tol Avoid toluene exposure By www.safetyandhealthmagazine.com Published On :: Sun, 27 Aug 2017 00:00:00 -0400 Toluene – often used in paint, metal cleaners and adhesives – is a clear, colorless liquid that vaporizes when exposed to air at room temperature. According to OSHA, it also has a sharp and sweet smell, which is a sign of exposure. Full Article
tol Angry customers, store ‘guardianship’ taking a toll on retail workers: study By www.safetyandhealthmagazine.com Published On :: Fri, 21 Apr 2023 14:01:32 -0400 Boca Raton, FL — Retail workers “are being asked to do too much,” and many are “leaving or throwing up their hands,” says a researcher from Florida Atlantic University. Full Article
tol International study shows high toll of worker sun exposure By www.safetyandhealthmagazine.com Published On :: Wed, 22 Nov 2023 00:00:00 -0500 Geneva, Switzerland — Workers exposed to the sun’s ultraviolet rays account for nearly a third of all non-melanoma skin cancer deaths, according to the results of a recent study. Full Article
tol Researchers say zero-tolerance cannabis policies may be ‘too broad’ By www.safetyandhealthmagazine.com Published On :: Tue, 01 Aug 2023 00:00:00 -0400 Toronto — Instead of having a zero-tolerance policy on cannabis use, employers may want to consider “minimum wait periods before a work shift when cannabis consumption is not allowed,” researchers say. Full Article
tol Toluene safety By www.safetyandhealthmagazine.com Published On :: Tue, 27 Nov 2018 00:00:00 -0500 Toluene is a clear and colorless liquid that turns to vapor when exposed to air at room temperature. According to OSHA, it’s often used in a mixture with other solvents and chemicals, such as paint pigments, so employees who work with paint, metal cleaners and adhesives may be at risk for exposure. Full Article
tol Rechargeable pistol-grip spotlight By www.safetyandhealthmagazine.com Published On :: Sun, 26 Apr 2020 00:00:00 -0400 The Waypoint 300 is a rechargeable high-lumen pistol-grip spotlight with enhanced down-range lighting capability. Featuring 270,000 candela, a 1,039-meter beam distance and 1,000 lumens on high, the spotlight’s powerful long-range targeting beam is portable and runs for 3.75 to 87 hours on high, medium and low, respectively. Full Article
tol Caregiving for family members takes a toll on workers: report By www.safetyandhealthmagazine.com Published On :: Mon, 11 Nov 2024 00:00:00 -0500 Chicago — One out of 5 workers who take a leave of absence to care for others later take leave for a medical condition of their own, results of a new analysis show. Full Article
tol Allergies and Intolerances to Certain Ingredients are Now Commonplace By www.preparedfoods.com Published On :: Fri, 21 Jul 2023 05:00:00 -0400 Over time, the body loses the ability to produce the enzyme (lactose) that digests the carbohydrate in dairy foods, causing bloating, gas, and sometimes diarrhea. Taking a lactase enzyme (Lactaid tablets) when you drink milk or eat dairy foods, will usually prevent symptoms of lactose intolerance. A food sensitivity, on the other hand, can produce symptoms that are unrelated to food allergies or intolerances. Full Article
tol The Controversy Surrounding Erythritol By www.preparedfoods.com Published On :: Tue, 14 Mar 2023 00:00:00 -0400 If you’ve been following this controversy surrounding erythritol, don’t panic yet. Check in first with David Feder, Executive Editor—Technical for Prepared Foods as he provides some reasoned opinion on the matter. Full Article
tol Natural Colors from Phytolon, Ginkgo Bioworks By www.preparedfoods.com Published On :: Thu, 01 Feb 2024 13:30:00 -0500 Phytolon, a biotechnology company that offers natural food colors via fermentation-based technologies, and Ginkgo Bioworks (NYSE: DNA), which is building the leading platform for cell programming and biosecurity, announced the successful completion of the first development milestone of their multi-product collaboration to produce natural food colors and the resulting distribution of an equity milestone to Ginkgo. Full Article
tol METTLER TOLEDO Introduces HazLoc-Compliant Metal Detectors By www.foodengineeringmag.com Published On :: Tue, 30 May 2023 08:00:00 -0400 Designed for manufacturing environments where dust-producing products can create an explosive atmosphere, the cETLus-certified systems adhere to construction standards and fulfill the requirements for Class II, Division 2 Hazardous locations. Full Article
tol Mohawk Builder + Multifamily Expands USA-Made Portolfio By www.floortrendsmag.com Published On :: Tue, 16 Apr 2024 08:00:00 -0400 Mohawk Builder + Multifamily is building a more sustainable world with a diverse portfolio of carpet, laminated wood and resilient flooring all made in the USA to help customers create greener communities. Full Article
tol METTLER TOLEDO Introduces X52 Dual Energy X-Ray Inspection System By www.foodengineeringmag.com Published On :: Thu, 10 Oct 2024 10:23:00 -0400 Designed to meet the demands of challenging applications in packaged products, the X52’s proprietary software seamlessly transitions between single energy, dual energy or both modes. Full Article
tol Stolen Pride: Loss, Shame, and the Rise of the Right By ifp.nyu.edu Published On :: Tue, 05 Nov 2024 16:31:28 +0000 The post Stolen Pride: Loss, Shame, and the Rise of the Right was curated by information for practice. Full Article Monographs & Edited Collections
tol The B/1 by Toledano & Chan Brings the Beauty of Brutalism to Your Wrist By design-milk.com Published On :: Wed, 17 Jul 2024 13:00:58 +0000 Now you can wear your brutally honest love for architecture on your wrist with the B/1 watch by Toledano & Chan inspired by Marcel Breuer's NYC landmark. Full Article Main Style + Fashion Alfred Chan angular Brutalism Brutalist horology Marcel Breuer Met Breuer Phil Toledano timepiece Toledano & Chan Toledano and Chan watch watches wrist watch wristwatch
tol The Bookshelf: Nelson's Stacia Tolman On Her Debut Novel By www.nhpr.org Published On :: Fri, 25 Oct 2019 17:03:24 -0400 Writer Stacia Tolman worked for many years as a high school English teacher at a private school in New Hampshire’s Monadnock region. Full Article
tol Ruby slippers from 'The Wizard of Oz' are for sale nearly 2 decades after they were stolen By www.mprnews.org Published On :: Tue, 05 Nov 2024 22:18:30 +0000 A pair of ruby slippers worn by Judy Garland in “The Wizard of Oz” is on the auction block nearly two decades after a thief stole the iconic shoes, convinced they were adorned with real jewels. Full Article
tol John Rhys-Davies narrates 'Scrooge' podcast; talks connection with Tolkien's Gimli: 'We all carry our chains' By www.christianpost.com Published On :: Tue, 12 Nov 2024 08:30:25 -0500 Actor John Rhys-Davies narrates a reimagined audio drama of "A Christmas Carol," drawn by the story’s themes of transformation, compassion and redemption, which he likens to the journeys of both Scrooge and his Rings character, Gimli, as they overcome prejudice and open their hearts to others. Full Article
tol The devil is in the detail: How the US stole USSR's victory over Japan By english.pravda.ru Published On :: Fri, 03 Sep 2021 21:02:00 +0300 The Russians love to win. Unfortunately, other countries often take advantage of our victories, whereas we easily forget about our military prowess. Today, during the Eastern Economic Forum in Vladivostok, few people in Russia may remember that it was the Soviet army that put an end to the worst war in the history of mankind - World War II, or the Great Patriotic War, as it is known in Russia. It was on September 3rd, when it happened. September 3rd is the official date of the end of World War II in the Soviet Union. It used to be celebrated as a non-working day and had been officially called the National Day of Victory over Imperialist Japan until 1947. One can still find posters at history museums in the Far East of Russia that say: Victory Day over Japan - September 3rd. The day of September 3rd was officially approved as the red date of the calendar by the decree from the Presidium of the Supreme Soviet of the USSR of September 2, 1945. USSR's first and, unfortunately, the only parade of victory over Japan took place on September 16, on the territory of Harbin, where the Chinese still take care of Soviet burials. Full Article History traditions
tol Dicarbonyl-1κ2C-μ-chlorido-2:3κ2Cl:Cl-pentachlorido-2κ2Cl,3κ3Cl-[1(η6)-toluene]digallium(III)ruthenium(I)(Ru—Ga) By journals.iucr.org Published On :: 2024-07-09 The title compound, [RuGa2Cl6(C7H8)(CO)2] or [(CO)2(GaCl2)(η6-toluene)Ru]+[GaCl4]−, was isolated from the reaction of Ga2Cl4 with diphenylsilanediol in toluene, followed by the addition of Ru3(CO)12. The compound contains a ruthenium–gallium metal–metal bond with a length of 2.4575 (2) Å. Full Article text
tol Crystal structure and analytical profile of 1,2-diphenyl-2-pyrrolidin-1-ylethanone hydrochloride or `α-D2PV': a synthetic cathinone seized by law enforcement, along with its diluent sugar, myo-inositol By journals.iucr.org Published On :: 2024-01-22 A confiscated package of street drugs was characterized by the usual mass spectral (MS) and FT–IR analyses. The confiscated powder material was highly crystalline and was found to consist of two very different species, accidentally of sizes convenient for X-ray diffraction. Thus, one each was selected and redundant complete sets of data were collected at 100 K using Cu Kα radiation. The selected crystals contained: (a) 1,2-diphenyl-2-(pyrrolidin-1-yl)ethanone hydrochloride hemihydrate or 1-(2-oxo-1,2-diphenylethyl)pyrrolidin-1-ium chloride hemihydrate, C18H20NO+·Cl−·0.5H2O, (I), a synthetic cathinone called `α-D2PV', and (b) the sugar myo-inositol, C6H12O6, (II), probably the only instance in which the drug and its diluent have been fully characterized from a single confiscated sample. Moreover, the structural details of both are rather attractive showing: (i) interesting hydrogen bonding observed in pairwise interactions by the drug molecules, mediated by the chloride counter-anions and the waters of crystallization, and (ii) π–π interactions in the case of the phenyl rings of the drug which are of two different types, namely, π–π stacking and edge-to-π. Finally, the inositol crystallizes with Z' = 2 and the resulting diastereoisomers were examined by overlay techniques. Full Article text
tol Microcrystal electron diffraction structure of Toll-like receptor 2 TIR-domain-nucleated MyD88 TIR-domain higher-order assembly By journals.iucr.org Published On :: 2024-09-04 Eukaryotic TIR (Toll/interleukin-1 receptor protein) domains signal via TIR–TIR interactions, either by self-association or by interaction with other TIR domains. In mammals, TIR domains are found in Toll-like receptors (TLRs) and cytoplasmic adaptor proteins involved in pro-inflammatory signaling. Previous work revealed that the MAL TIR domain (MALTIR) nucleates the assembly of MyD88TIR into crystalline arrays in vitro. A microcrystal electron diffraction (MicroED) structure of the MyD88TIR assembly has previously been solved, revealing a two-stranded higher-order assembly of TIR domains. In this work, it is demonstrated that the TIR domain of TLR2, which is reported to signal as a heterodimer with either TLR1 or TLR6, induces the formation of crystalline higher-order assemblies of MyD88TIR in vitro, whereas TLR1TIR and TLR6TIR do not. Using an improved data-collection protocol, the MicroED structure of TLR2TIR-induced MyD88TIR microcrystals was determined at a higher resolution (2.85 Å) and with higher completeness (89%) compared with the previous structure of the MALTIR-induced MyD88TIR assembly. Both assemblies exhibit conformational differences in several areas that are important for signaling (for example the BB loop and CD loop) compared with their monomeric structures. These data suggest that TLR2TIR and MALTIR interact with MyD88 in an analogous manner during signaling, nucleating MyD88TIR assemblies unidirectionally. Full Article text
tol Structure–property relationship of a complex photoluminescent arylacetylide-gold(I) compound. I: a pressure-induced phase transformation caught in the act By journals.iucr.org Published On :: 2024-08-23 A pressure-induced triclinic-to-monoclinic phase transition has been caught `in the act' over a wider series of high-pressure synchrotron diffraction experiments conducted on a large, photoluminescent organo-gold(I) compound. Here, we describe the mechanism of this single-crystal-to-single-crystal phase transition, the onset of which occurs at ∼0.6 GPa, and we report a high-quality structure of the new monoclinic phase, refined using aspherical atomic scattering factors. Our case illustrates how conducting a fast series of diffraction experiments, enabled by modern equipment at synchrotron facilities, can lead to overestimation of the actual pressure of a phase transition due to slow transformation kinetics. Full Article text
tol Crystal structure and Hirshfeld surface analysis of dimethyl 4-hydroxy-5,4'-dimethyl-2'-(toluene-4-sulfonylamino)biphenyl-2,3-dicarboxylate By journals.iucr.org Published On :: 2024-01-01 In the title compound, C25H25NO7S, the molecular conformation is stabilized by intramolecular O—H⋯O and N—H⋯O hydrogen bonds, which form S(6) and S(8) ring motifs, respectively. The molecules are bent at the S atom with a C—SO2—NH—C torsion angle of −70.86 (11)°. In the crystal, molecules are linked by C—H⋯O and N—H⋯O hydrogen bonds, forming molecular layers parallel to the (100) plane. C—H⋯π interactions are observed between these layers. Full Article text
tol Synthesis and crystal structures of bis[1-oxopyridin-2-olato(1−)]bis(pentafluorophenyl)silicon(IV)–tetrahydrofuran–pentane (2/1/1), bis[1-oxopyridin-2-olato(1−)]bis(p-tolyl)silicon(IV), and dimes By journals.iucr.org Published On :: 2024-02-20 The neutral organosilicon(IV) complex, (C6F5)2Si(OPO)2 (OPO = 1-oxopyridin-2-one, C5H4NO2), was synthesized from (C6F5)2Si(OCH3)2 and 2 equiv. of 1-hydroxypyridin-2-one in tetrahydrofuran (THF). Single crystals grown from the diffusion of n-pentane into a THF solution were identified as a THF hemisolvate and an n-pentane hemisolvate, (C6F5)2Si(OPO)2·0.5THF·0.5C5H12 (1). p-Tolyl2Si(OPO)2 (2) and mesityl2Si(OPO)2 (3) crystallized directly from reaction mixtures of 2 equiv. of Me3Si(OPO) with p-tolyl2SiCl2 and mesityl2SiCl2, respectively, in acetonitrile. The oxygen-bonded carbon and nitrogen atoms of the OPO ligands in 1, 2, and 3 were modeled as disordered indicating co-crystallization of up to three possible diastereomers in each. Solution NMR studies support the presence of exclusively the all-cis isomer in 1 and multiple isomers in 2. Poor solubility of 3 limited its characterization in solution. Full Article text
tol Crystal structures of the (η2:η2-cycloocta-1,5-diene)(η6-toluene)iridium(I) cation and μ-chlorido-iridium(III) complexes of 2-(phosphinito)- and 2-(phosphinomethyl)anthraquinone ligands By journals.iucr.org Published On :: 2024-09-30 When reacted in dry, degassed toluene, [Ir(COD)Cl]2 (COD = cycloocta-1,5-diene) and 2 equivalents of 2-(di-tert-butylphosphinito)anthraquinone (tBuPOAQH) were found to form a unique tri-iridium compound consisting of one monoanionic dinuclear tri-μ-chlorido complex bearing one bidentate tBuPOAQ ligand per iridium, which was charge-balanced by an outer sphere [Ir(toluene)(COD)]+ ion, the structure of which has not previously been reported. This product, which is a toluene solvate, namely, (η2:η2-cycloocta-1,5-diene)(η6-toluene)iridium(I) tri-μ-chlorido-bis({3-[(di-tert-butylphosphanyl)oxy]-9,10-dioxoanthracen-2-yl}hydridoiridium(III)) toluene monosolvate, [Ir(C7H8)(C8H12)][Ir2H2(C22H24O3P)2Cl3]·C7H8 or [Ir(toluene)(COD)][Ir(κ-P,C-tBuPOAQ)(H)]2(μ-Cl)3]·toluene, formed as small orange platelets at room temperature, crystallizing in the triclinic space group Poverline{1}. The cation and anion are linked via weak C—H⋯O interactions. The stronger intermolecular attractions are likely the offset parallel π–π interactions, which occur between the toluene ligands of pairs of inverted cations and between pairs of inverted anthraquinone moieties, the latter of which are capped by toluene solvate molecules, making for π-stacks of four molecules each. The related ligand, 2-(di-tert-butylphosphinomethyl)-anthraquinone (tBuPCAQH), did not form crystals suitable for X-ray diffraction under analogous reaction conditions. However, when the reaction was conducted in chloroform, yellow needles readily formed following addition of 1 atm of carbon monoxide. Diffraction studies revealed a neutral, dinuclear, di-μ-chlorido complex, di-μ-chlorido-bis(carbonyl{3-[(di-tert-butylphosphanyl)oxy]-9,10-dioxoanthracen-2-yl}hydridoiridium(I)), [Ir2H2(C23H26O2P)2Cl2(CO)2] or [Ir(κ-P,C-tBuPCAQ)(H)(CO)(μ-Cl)]2, Ir2C48H54Cl2O6P2, again crystallizing in space group Poverline{1}. Offset parallel π–π interactions between anthraquinone groups of adjacent molecules link the molecules in one dimension. Full Article text