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Search query: C-substituted imidazoles
41 articles match your search "C-substituted imidazoles"Results 1 to 10, sorted by relevance:
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The reactions of Cu(ClO4)2·6H2O and L′H in a variety of solvents have provided access to 12 solvatomorphs of the general formula [Cu(ClO4)2(LH)4]·x(solvent); the effect of the solvents on the packing of the complexes is critically discussed.
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Three 2-substituted benzimidazole esters each exhibit different types of molecular disorder and different patterns of supramolecular assembly.
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An efficient and regioselective microwave-assisted synthesis of tri-substituted imidazoles is presented. Crystallographic results show a correlation between substituent groups, molecular conformation and supramolecular assembly, with the energy frameworks dominated by dispersion forces. N-Substituted imidazoles were tested against standardized strains of the clinically important fungi Candida albicans and Cryptococcus neoformans, displaying good activities against C. neoformans.
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Two 1-phenyl-1H-imidazoles, 4-(1H-imidazol-1-yl)benzaldehyde and 1-(4-methoxyphenyl)-1H-imidazole, differ in the substituent para to the imidazole group on the arene ring. Both molecules pack with different motifs via similar weak C—H
N/O interactions and differ with respect to the angles between the mean planes of the imidazole and arene rings.
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Infinite chains connected by N—H
N hydrogen bonding form the primary packing motif in two closely related 4-nitroimidazole derivatives, viz. 5-bromo-2-methyl-4-nitro-1H-imidazole, C4H4BrN3O2, (I), and 2-methyl-4-nitro-1H-imidazole-5-carbonitrile, C5H4N4O2, (II). These chains are almost identical, even though in (II) there are two symmetry-independent molecules in the asymmetric unit. The differences appear in the interactions between the chains; in (I), there are strong C—Br
O halogen bonds, which connect the chains into a two-dimensional grid, while in (II), the cyano group does not participate in specific interactions and the chains are only loosely connected into a three-dimensional structure.
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The title compound, C8H4N4O2, was prepared to explore the synthesis of some 4-substituted imidazoles. The molecule is centrosymmetric and almost planar. In the crystal structure, centrosymmetric dimers are formed via C—H
N hydrogen bonds. The dimers are linked by further C—H
N hydrogen bonds, forming a three-dimensional network.
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Nitrogen K-edge XANES spectroscopy has been used to develop a systematic overview on spectral features of all major N functions in soil and environmental samples. This information provides a basis to develop N K-edge XANES to study the molecular composition and ecological functions of previously unidentified N.
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The structures of three distinct forms (cocrystal, salt and a hybrid cocrystal of salt) of multicomponent crystals of imidazole-based drugs (metronidazole, ketoconazole and miconazole) with trithiocyanuric acid as coformer are characterized. Their supramolecular architectures reflect the interplay between different molecular species.
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This article highlights general and modern synthetic strategies to synthesize metal-organic frameworks (MOFs), and discusses their structural diversity and properties with respect to application perspectives.
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The title compound, C24H19ClN2, crystallizes with two independent molecules in the asymmetric unit. The prop-2-enyl substituents on the imidazole rings adopt similar conformations in the two molecules. The 4-and 5-substituted phenyl rings and the benzene ring make dihedral angles of 67.06 (8), 5.61 (8) and 41.09 (8)°, respectively, with the imadazole ring in one molecule and 71.53 (8), 28.85 (8) and 41.87 (8)°, respectively, in the other. The crystal structure features C—H
π interactions and weak π–π stacking interactions [centroid–centroid distances = 3.6937 (10) and 4.0232 (10) Å] between the chlorophenyl rings, which form a three-dimensional supramolecular structure.
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