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Search query: C-substituted imidazoles
41 articles match your search "C-substituted imidazoles"Results 1 to 10, sorted by relevance:
research papers
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.
research communications
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Three 2-substituted benzimidazole esters each exhibit different types of molecular disorder and different patterns of supramolecular assembly.
research papers
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.
N/O interactions and differ with respect to the angles between the mean planes of the imidazole and arene rings.
organic compounds
Infinite chains connected by N—HN 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—BrO 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.
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—BrO 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.organic compounds
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—HN hydrogen bonds. The dimers are linked by further C—HN hydrogen bonds, forming a three-dimensional network.
N hydrogen bonds. The dimers are linked by further C—HN hydrogen bonds, forming a three-dimensional network.
research papers
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.
research papers
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.
feature articles
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.
organic compoundsOpen access
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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—Hπ 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.
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.
