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The following articles are a selection of those recently accepted for publication in Acta Crystallographica Section E: Crystallographic Communications.
See also Forthcoming articles in all IUCr journals.
research communications (GO)Partial charge transfer in the salt co-crystal of L-ascorbic acid and 4,4′-bipyridine
In the title 1:2 co-crystal, L-ascorbic acid (LAA) and 4,4′-bipyridine (bpy) co-crystallize with two molecules of LAA, and one molecule of bpy in the asymmetric unit. The structure was modeled in two parts due to possible proton transfer from LAA to the corresponding side of the bpy molecule having an occupancy of approximately 0.25 and part 2 with an occupancy of approximately 0.75.
research communications (GM)Potassium chloridotris(hypersiloxy)aluminate dimer
The tris(trimethylsilylsiloxide) ligand, also known as hypersiloxide, is an extremely bulky group. In an attempt to make the monomeric Al(OSi(SiMe3)3)3, AlCl3 was combined with 3 equiv. of potassium hypersiloxide. The title compound, a KCl adduct of aluminium tris(hypersilyloxide) that is dimerized through a planar K2Cl2 ring, was isolated.
research communications (GM)Synthesis and structural study of tris(2,6-diaminopyridinium) bis(oxalato)dioxidovanadate(V) 2.5-hydrate
The synthesis of complex compounds based on vanadium oxalates has grown considerably during the last decades, because of there biological and catalytic applications. This paper describes the synthesis and characterization of a new dioxovanadate(V) complex, (C5H8N3)3[VO2(C2O4)2]·2.5H2O.
research communications (GO)Crystal structure and optical properties of fused-ring chalcone (E)-3-(anthracen-9-yl)-1-(4-nitrophenyl)prop-2-en-1-one
The title chalcone derivative adopts an s-cis conformation with respect to the enone fragment and is non-planar with a dihedral angle of 48.63 (14)° between the anthracene ring system and the nitrobenzene ring. In the crystal, molecules are linked into inversion dimers with an 
(10) graph-set motif via pairs of intermolecular C—H⋯O hydrogen bonds.
research communications (GO)Polymorphism and pseudosymmetry of 10,10′-oxybis(9-thia-10-hydro-10-boraanthracene)
Two polymorphs of the title compound are reported. The first crystallizes in the non-centrosymmetric space group P21 with four molecules, related by pseudosymmetry, in the asymmetric unit. The second crystallizes in the centrosymmetric space group P21/c with only two molecules in the asymmetric unit.
research communications (GO)Crystal structures of 4-{(E)-3-[(imino-λ5-azanylidene)amino]prop-1-enyl}-N,N-dimethylimidazole-1-sulfonamide and 2-[(imino-λ5-azanylidene)amino]-4-{(E)-3-[(imino-λ5-azanylidene)amino]prop-1-enyl}-N,N-dimethylimidazole-1-sulfonamide
The structures of two azide containing imidazole derivatives are reported. The first, C8H12N6O2S, contains one azide group with an Nα—Nβ distance of 1.229 (2) Å and an Nβ—Nγ distance of 1.128 (2) Å. The second, C8H11N9O2S, contains two azide groups with an average Nα—Nβ distance of 1.249 (2) Å and an average Nβ—Nγ distance of 1.132 (2) Å. Each compound contains a bulky protecting group.
research communications (GM)Crystal structure and Hirshfeld surface analysis of (μ-2-{4-[(carboxylatomethyl)carbamoyl]benzamido}acetato-κ2O:O′)bis[bis(1,10-phenanthroline-κ2N,N′)copper(II)] dinitrate N,N′-(1,4-phenylenedicarbonyl)diglycine monosolvate octahydrate
The CuII atom in the title compound has a distorted trigonal–bipyramidal coordination environment defined by four N atoms from two bidentate 1,10-phenanthroline ligands and one oxygen atom from one-half of the monodentate N,N′-(1,4-phenylenedicarbonyl)diglycinate ligand. The dinuclear complex cations and the nitrate counter-anions as well as the solvate molecules are linked by an intricate network of hydrogen bonds.
research communications (GI)Synthesis and crystal structure of a neodymium borosilicate, Nd3BSi2O10
The crystal structure of a lanthanide borosilicate, Nd3BSi2O10, has been determined from laboratory X-ray powder diffraction data. It is composed of [SiO4]4− and [BSiO6]5− anionic layers linked by Nd3+ cations between them.
research communications (GO)Crystal structure and Hirshfeld surface analysis of N-(5-iodo-4-phenylthiazol-2-yl)acetamide
The title compound crystallizes with two independent molecules in the asymmetric unit. In the crystal, molecules are linked by N—H⋯O hydrogen bonds, C—H⋯π, I⋯S and I⋯I interactions into a three-dimensional network.
research communications (GO)Crystallographic analysis of two oxetanocin derivatives, 3-[(6-chloro-8,9-dihydro-7H-purin-7-yl)methyl]cyclobutan-1-ol and 3-[(6-chloro-9H-purin-9-yl)methyl]cyclobutan-1-ol, and the synthetic intermediate 3-[(6-chloro-7H-purin-7-yl)methyl]cyclobutan-1-one
Two oxetanocin A derivatives have been synthesized stereospecifically. The structures of both derivatives and a synthetic intermediate were determined and analyzed using X-ray crystallography.
