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Povesti pokoĭnogo Ivana Petrovicha Belkina [Electronic book] / Aleksandr Sergeevich Pushkin.

Warszawa : Izdatelʹstvo Ktoczyta.pl, 2018.




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Private university in Tindivanam launches swipe card for students




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Mudinja Ivana Pudi: Mixed doubles

The film tries to subvert the classic evil-twin template.




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Don’t reduce quantum of advance, Minister Shivanand Patil tells NABARD




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Disney Hotstar head Sajith Sivanandan quits after India merger with Reliance: Report

The leadership has yet to decide if JioCinema will continue as a separate app, said two of the sources, who all spoke on condition of anonymity, as the discussions are private




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Redetermination of di­ammonium trivanadate, (NH4)2V3O8

The crystal structure of (NH4)2V3O8 has been reported twice using single-crystal X-ray data [Theobald et al. (1984). J. Phys. Chem. Solids, 45, 581–587; Range et al. (1988). Z. Naturforsch. Teil B, 43, 309–317]. In both cases, the orientation of the ammonium cation in the asymmetric unit was poorly defined: in Theobald's study, the shape and dimensions were constrained for NH4+, while in Range's study, H atoms were not included. In the present study, we collected a highly redundant data set for this ternary oxide, at 0.61 Å resolution, using Ag Kα radiation. These accurate data reveal that the NH4+ cation is disordered by rotation around a non-crystallographic axis. The rotation axis coincides with one N—H bond lying in the mirror m symmetry element of space-group type P4bm, and the remaining H sites were modelled over two disordered positions, with equal occupancy. It therefore follows that the NH4+ cations filling the space available in the (001) layered structure formed by (V3O8)2– ions do not form strong N—H⋯O hydrogen bonds with the mixed-valent oxidovanadate(IV,V) anions. This feature could have consequences for the Li-ion inter­calation properties of this material, which is used as a cathode for supercapacitors.




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Crystal structure of tetra­kis­[μ-3-carboxy-1-(1,2,4-triazol-4-yl)adamantane-κ2N1:N2]tetra­fluoridodi-μ2-oxido-dioxidodisilver(I)divanadium(V) tetra­hydrate

The crystal structure of the title mol­ecular complex, [Ag2{VO2F2}2(C13H17N3O2)4]·4H2O, supported by the heterofunctional ligand tr-ad-COOH [1-(1,2,4-triazol-4-yl)-3-carb­oxy­adamantane] is reported. Four 1,2,4-triazole groups of the ligand link two AgI atoms, as well as AgI and VV centres, forming the heterobimetallic coordination cluster {AgI2(VVO2F2)2(tr)4}. VV exists as a vanadium oxofluoride anion and possesses a distorted trigonal–bipyramidal coordination environment [VO2F2N]. A carb­oxy­lic acid functional group of the ligand stays in a neutral form and is involved in hydrogen bonding with solvent water mol­ecules and VO2F2− ions of adjacent mol­ecules. The extended hydrogen-bonding network is responsible for the crystal packing in the structure.






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GIScience teaching and learning perspectives / Shivanand Balram, James Boxall, editors

Online Resource




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Innovation for the urban age: innovative approaches to public governance for the new urban age : the Winelands papers 2014 / Goos Minderman and Purshottama Sivanarain Reddy (Eds.)