CXXXVII.—The cis- and trans-modifications of 1-methyl-cyclohexan-2-ol-4-carboxylic acid and their conversion into 1-methyl-Δ1-cyclohexene-4-carboxylic acid
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چکیده
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5-Methyl-1-phenyl-1H-1,2,3-triazole-4-carboxylic acid
The title compound, C(10)H(9)N(3)O(2), was synthesized from azido-benzene and ethyl acetyl-acetate. A pair of hydrogen bonds [2.617 (2) Å] inter-connects a pair of the carboxyl groups, forming an R(2) (2)(8) inversion dimer, a frequent motif in carboxylic acids. In the title structure, the bonding H atom in the aforementioned O-H⋯O hydrogen bond is significantly shifted towards the acceptor O a...
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The stereochemistry and regiochemistry of the title compound, C18H18O2, were determined by the X-ray analysis. There are two independent mol-ecules in the asymmetric unit in which the dihedral angles between the benzene rings are 88.31 (4) and 86.27 (4)°. The cyclo-hexene rings are in half-chair conformations. In the crystal, O-H⋯O hydrogen bonds link alternating types of mol-ecules into chains...
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In the title compound, C(12)H(14)N(2)O(2), the benzene ring and imidazole ring are almost coplanar, making a dihedral angle of 2.47 (14)°. Inter-molecular O-H⋯N, N-H⋯O and C-H⋯O hydrogen bonds stabilize the crystal structure.
متن کامل1-Methyl-1H-indazole-3-carboxylic acid
The asymmetric unit of the title compound, C(9)H(8)N(2)O(2), contains two mol-ecules. In the crystal structure, both mol-ecules form inversion dimers via pairs of O-H⋯O hydrogen bonds, and a C-H⋯O inter-ation is also seen.
متن کامل2-Methyl-4-trifluoromethyl-1,3-thiazole-5-carboxylic acid
In crystal of the title compound, C(6)H(4)F(3)NO(2)S, mol-ecules are linked by O-H⋯N and C-H⋯O hydrogen bonds, forming chains.
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ژورنال
عنوان ژورنال: J. Chem. Soc., Trans.
سال: 1908
ISSN: 0368-1645
DOI: 10.1039/ct9089301416