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Multi-step chirality transfer and racemization kinetics of pillar [5]arenes by tuning the halogen substituents on the rims

Org. Chem. Front., 2024, Advance Article
DOI: 10.1039/D4QO01799D, Research Article
Lizhi Fang, Xiaowen Guan, Yanling Shen, Dayang Zhou, Long Chen, Xiaochuan Chen, Wanhua Wu, Leyong Wang, Cheng Yang
Halogen-substituted pillar[5]arenes exhibited hindered hydroquinone subunit flipping, enabling enantioseparation.
To cite this article before page numbers are assigned, use the DOI form of citation above.
The content of this RSS Feed (c) The Royal Society of Chemistry




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Theoretical insights into Pd-catalyzed dual γ-1,1-C(sp3)–H activation of aliphatic carboxylic acids: mechanistic pathways, substituent influence on product selectivity, diastereoselectivity, and additive effects

Org. Chem. Front., 2024, 11,6393-6410
DOI: 10.1039/D4QO01451K, Research Article
Jiaoyang Liu, Li-juan Huang, Zeang Sun, Juan Li
DFT calculations were employed to explore the detailed reaction mechanism and the origins of the experimentally observed product, regio-, and diastereoselectivities in the Pd-catalyzed dual-γ-1,1-C(sp3)–H activation of aliphatic carboxylic acids.
The content of this RSS Feed (c) The Royal Society of Chemistry




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Cyberabad | Four arrested for vandalising Gandhi statue




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Characterization and quantification of the phytochemical constituents and anti-inflammatory properties of Lindera aggregata

RSC Adv., 2024, 14,36101-36114
DOI: 10.1039/D4RA05643D, Paper
Open Access
  This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Song-Song Wen, Yong-Jun Liu, Yu-Lin Liu, Yan Zhao, Xiao-Xi Xu, Chang-Chuan Guo, Chong Niu, Wei-Jian Wang, Yu-Wen Xu, Na Zhang
This study developed a method to analyze the bioactive compounds in Lindera aggregata roots, identifying 80 compounds, with 16 quantified, and found that specific compounds exhibit anti-inflammatory effects.
The content of this RSS Feed (c) The Royal Society of Chemistry




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Jharkhand Election 2024: Full List Of Candidates And Their Constituencies

Jharkhand Election 2024 Candidates List: A total of 1,211 candidates remain in the contest for the Jharkhand Assembly Elections.




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BJP’s Anil Baluni is banking on religion and development to win in Garhwal (Pauri), Uttarakhand’s largest constituency

This is ‘Devbhoomi’ (land of the gods) and its people will never forget how Congress posed hurdles in the construction of the Ram Mandir, the BJP’s media chief says



  • Lok Sabha Elections

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Temperature effect on the steric and polar Taft substituent parameter values

React. Chem. Eng., 2024, 9,833-841
DOI: 10.1039/D3RE00500C, Paper
Sindi Baco, Marcel Klinksiek, Mélanie Mignot, Christoph Held, Julien Legros, Sébastien Leveneur
We investigate the influence of temperature by re-evaluating the substituent parameters of the Taft equation applied to the esterification of levulinic acid by methanol and ethanol, and the saponification of methyl and ethyl levulinates.
The content of this RSS Feed (c) The Royal Society of Chemistry




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The virtues of multi-generational teams

The key is to synergise the unique strengths that each generation contributes. This involves fostering an environment of mutual respect and a shared purpose




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Parashuram statue case: Sculptor arrested in Puducherry




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Cian Agro Industries & Infrastructure Ltd - Board Meeting Intimation for Meeting Of The Board Of Directors Of The Company Is Scheduled To Be Held On Tuesday, 13Th August, 2019 To Consider And Approve The Un-Audited Financial Results Of The Company For





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Shillong Teer Result TODAY 12.11.2024 OUT: First And Second Round Tuesday Lottery Result

Shillong Teer Result Tuesday 12.11.2024: On November 12, the first and second round Shillong Teer numbers will be announced on 4 PM. The Khasi Hills Archery Sports Association runs Shillong Teer, a one-of-a-kind lottery game centered on archery, scroll down for the result update.




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Dennis Stuehr receives Morley Medal




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Sharad Pawar hints at retirement from parliamentary politics, bats for Yugendra in Baramati Assembly constituency




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In Maharashtra’s Kagal constituency, a tussle over reformer Shahu Maharaj’s progressive legacy




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Amol Khatal, grandson of Congress leader B J Khatal, seeks to oust Sangamner MLA Balasaheb Thorat from his constituency of decades




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Merged Air India-Vistara's 1st flight on Tue

Vistara will be merged with Air India on Monday night, and from Tuesday onward, the Vistara flight code will change from 'UK' to 'AI2XXX'.




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I’m still reeling from Tuesday...

Rejected by cabbies and out of ‘legal’ cash, LOCAL TEA PARTY faces life without 500- and 1000-rupee notes





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Dürre in Deutschland: Waldbrandatlas zeigt aktuelle Risikozonen

Das Jahr 2020 ist bislang ungewöhnlich trocken, die Waldbrandgefahr ist hoch. Eine Karte zeigt das Risiko bundesweit - und berücksichtigt dabei auch Faktoren wie Windrichtung und aufziehende Regenwolken.




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Trinidad to start reopening Tuesday, but borders to remain closed until June

(CMC): Trinidad and Tobago says its borders are to remain closed until June, even as it embarks on softening restrictions to re energise the economy, which had been halted by COVID-19.   Prime Minister Dr Keith Rowley said the...




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Dr. Fauci plans to attend Senate hearing Tuesday amid 'modified' coronavirus quarantine

Dr. Anthony Fauci will testify at the Senate Health Committee Tuesday, Fox News has learned, while two other White House coronavirus task force members will attend the hearing via video conference after placing themselves in quarantine.



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  • Chad Pergram

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International Migration Day, Tuesday 18 December

International Migration Day, Tuesday 18 December




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Media Advisory - Launch Latin American Economic Outlook 2015 at the XXIV Ibero-American Summit on Tuesday 9 December 2014

OECD Development Centre, ECLAC and CAF to launch their joint Latin American Economic Outlook 2015 at the XXIV Ibero-American Summit on Tuesday 9 December 2014




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Register for the webinar - PISA 2015 Results (Volume V): Collaborative Problem Solving (Tuesday, 21 November,16:00 Paris time)

The assessment examines students’ ability to work with two or more people to try to solve a problem. The report highlights how students’ gender, socio-economic status and immigrant background are related to their performance in the assessment and to their attitudes towards collaboration in general.




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Britons urged to shine a light from windows on Tuesday in tribute to nurses on coronavirus frontline

Public are being encouraged to shine a light from windows in recognition of nurses in the coronavirus fight, described as the 'greatest health emergency in NHS history'.




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The saddest casualty of William and Harry's feud... is Diana's statue 

Holding umbrellas aloft to guard against an unseasonal shower, Princes William and Harry seemed lost in thought as they toured the new 'white garden' at Kensington Palace.




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Britons urged to shine a light from windows on Tuesday in tribute to nurses on coronavirus frontline

Public are being encouraged to shine a light from windows in recognition of nurses in the coronavirus fight, described as the 'greatest health emergency in NHS history'.




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The saddest casualty of William and Harry's feud... is Diana's statue 

Holding umbrellas aloft to guard against an unseasonal shower, Princes William and Harry seemed lost in thought as they toured the new 'white garden' at Kensington Palace.




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Christmas 2015: Bengaluru gets a 50 feet tall statue of Christ

To make this Christmas season even more special, a 50 feet tall statue of Christ the Redeemer has been installed by Fun World in J C Nagar.





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Tooth−gum border fluid constituents mapped

Proteins from gingival crevicular fluid may provide a window on periodontitis.




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Kejriwal's statue installed at wax museum in Ludhiana




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[Se(CH2C(O)CH3)3][B12F11NH3]: The first selenium cation with three β-ketone substituents

The reaction of [Se8][B12F11NH3]2 with acetone and subsequent crystallization from acetone/diethyl ether yielded the selenium cation [Se(CH2C(O)CH3)3]+ as a by-product, which is stabilized by the weakly coordinating undeca­fluorinated anion [B12F11NH3]−. While attempting to crystallize pure [Se8][B12F11NH3]2, the structure of the isolated product, namely, tris­(2-oxoprop­yl)selenium 1-ammonio­undeca­fluoro­dodeca­borate, was surprising. The cation [Se(CH2C(O)CH3)3]+ represents the first example for a cationic selenium compound with three ketone functional groups located in the β-position with respect to the selenium atom. The cation possesses almost trigonal–pyramidal C3 symmetry and forms hydrogen bonds to the ammonio group of the anion.




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Phospho­rescent mono- and diiridium(III) complexes cyclo­metalated by fluorenyl- or phenyl-pyridino ligands with bulky substituents, as prospective OLED dopants

The crystal structures of tris­[9,9-dihexyl-2-(5-meth­oxy­pyridin-2-yl-κN)-9H-fluoren-3-yl-κC3]iridium pentane monosolvate, [Ir(C31H38NO)3]·C5H12, (I), di-μ2-chlorido-bis­{bis­[2-(5-fluoro­pyridin-2-yl)-9,9-dihexyl-9H-fluoren-3-yl]iridium} pentane 0.3-solvate, [Ir2(C30H35FN)4Cl2]·0.3C5H12, (II), di-μ2-cyanato-bis­{bis­[9,9-dihexyl-2-(5-meth­oxy­pyridin-2-yl)-9H-fluoren-1-yl]iridium} pentane monosolvate, [Ir2(C31H38NO)4(NCO)2(NCO)2]·C5H12, (III), and {μ-N,N'-bis­[3,5-bis­(tri­fluoro­meth­yl)phen­yl]oxamidato}bis(bis{2-[4-(2,4,6-trimethylphenyl)pyridin-2-yl]phenyl-κ2C1,N'}iridium)–chloro­benzene–pentane (1/2.3/0.4), [Ir2(C20H19N)4(C18H6F12N2O2)]·2.3C6H5Cl·0.4C5H12, (IV), synthesized in the quest for organic light-emitting devices, were determined. The bis-μ2-chloro and bis-μ2-cyanato complexes have ΔΔ and ΛΛ configurations of the distorted octa­hedral Ir centres in racemic crystals, whereas the oxamido complex has a centrosymmetric (meso) structure with the ΔΛ configuration. The bridging oxamido moiety has a nearly planar anti geometry. All structures show substantial disorder of both host mol­ecules and solvents of crystallization.




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Synthesis and crystallographic, spectroscopic and computational characterization of the effects of O—R substituents on the torsional[torsion] angle of 3,3',4,4'-substituted bi­phenyls

The synthesis, characterization and study of structures from a series of bi­phenyls substituted at positions 3, 3', 4 and 4' with groups connected to the bi­phenyl core through oxygen atoms are presented here. The molecular conformation is extensively studied both in the solid as well as in the liquid state, and the effect of different actors (such as packing and chain length) on the torsion angle between aromatic rings is analyzed.





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Fulcaldea stuessyi is newly discovered member of the Barnadesioideae, a subfamily of the Compositae, or sunflower family of flowering plants,

Fulcaldea stuessyi is a newly discovered member of the Barnadesioideae, a subfamily of the Compositae, or sunflower family of flowering plants. It was found in northeastern […]

The post Fulcaldea stuessyi is newly discovered member of the Barnadesioideae, a subfamily of the Compositae, or sunflower family of flowering plants, appeared first on Smithsonian Insider.




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Constituent materials more important than weight or class for environmental impact of shipbreaking, but valuation methods differ greatly

When broken down, ships can release hazardous substances into the environment. This study investigated the environmental impact of shipbreaking in one of Europe’s few ship recycling yards, based in Portugal. The results reveal large differences between assessment methods and show that environmental impact depends on composition rather than size or class.




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REMINDER: NEW I-95 OVERPASS OPENS ON MUDD TAVERN ROAD TOMORROW IN SPOTSYLVANIA COUNTY - Two lanes of Mudd Tavern Road traffic will begin traveling over the new overpass after the morning rush hour on Tuesday, Oct. 23

FREDERICKSBURG, Va. – The Virginia Department of Transportation (VDOT) will open the new overpass on Mudd Tavern Road tomorrow , Oct. 23  in...




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Design Public Hearing for Business Route 23 widening in Wise Tuesday - October 16 from 4 - 6 p.m. at Wise Municipal Building

BRISTOL – The Virginia Department of Transportation (VDOT) will hold a design public hearing tomorrow to show plans for the widening of a half-mile section of Business Route 23 in the Town of Wise.




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Mummy found hiding inside ancient Buddha statue

A Chinese statue of a Buddha has revealed a hidden surprise: The mummified remains of a monk who lived nearly 1,000 years ago.



  • Research & Innovations

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We just found out this haunting Russian statue is 11,600 years old

Covered in a code no one can understand, the Shigir Idol is the oldest wooden structure in the world.



  • Arts & Culture

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Daily Briefing: Tues. 3/2/2010

Obama unveils "cash for caulkers," quake tilted Earth's axis, weed killer tied to sex changes, and more.



  • Green News Roundup

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Daily Briefing: Tues. 5/10/2011

River crests in Memphis, fracking linked to water pollution, scientists speak with dolphins, and climate changes causes chaos for penguins.



  • Green News Roundup

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Daily Briefing: Tues. 5/17/2011

Delta flood risk spreads, first squid leaves Earth, blood test reveals life span, and more.



  • Green News Roundup

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Daily Briefing: Tues. 5/24/2011

U.S. sets tornado records, vines worsen warming, bee crisis continues, and the Fukushima Daiichi nuclear plant likely suffered meltdowns.



  • Green News Roundup

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Daily Briefing: Tues. 5/31/2011

Space shuttle heads home, U.S. floods spread, CO2 emissions rise, and the amount of groundwater humans use is adjusting the earth's wobble.



  • Green News Roundup

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Daily Briefing: Tues. 6/7/2011

Fires scorch Arizona, floods boost wildlife, speed limits may save whales, and more.



  • Green News Roundup

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Daily Briefing: Tues. 6/14/2011

GOP candidate targets EPA, fires doom fireworks, Scotts embraces pot, and the Missouri River breaks through two levees.



  • Green News Roundup