Three-dimensional hydrogen-bonded structures in the guanidinium salts of the monocyclic dicarboxylic acidsrac-trans-cyclohexane-1,2-dicarboxylic acid (2:1, anhydrous), isophthalic acid (1:1, monohydrate) and terephthalic acid (2:1, trihydrate)
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چکیده
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Ascorbic Acid Dehydroascorbic Acid C6 Dicarboxylic Acid
Dehydroascorbic acid is shown to be converted to 2-(threo-l,2,3-trihydroxypropyl)tartronic acid in aqueous alkaline solutions. The structure of the acid was determined by mass spectrometry of its acyclic Me3Si derivative. Mass spectrometric and chromatographic data are compared with those of related compounds. The acid is formed by a benzilic acid rearrangement of the intermediate 2,3-hexodiulo...
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15 صفحه اولcis-Cyclohexane-1,4-dicarboxylic acid
In the title compound, C(8)H(12)O(4), the two carboxyl groups are on the same side of the cyclohexane ring and the ring adopts a chair conformation. Adjacent mol-ecules related by an inversion centre are linked by pairs of O-H⋯O hydrogen bonds, forming a zigzag chain along [1].
متن کامل2,2′-Bipyridine-5,5′-dicarboxylic acid
The title mol-ecule, C(12)H(8)N(2)O(4), lies on an inversion center. In the crystal structure, inter-molecular O-H⋯O hydrogen bonds connect mol-ecules into one-dimensional chains along [11].
متن کاملLow-temperature redetermination of trans-cyclohexane-1,2-dicarboxylic acid
The mol-ecule of the title compound, C(8)H(12)O(4), lies on a twofold rotation axis that passes through the mid-points of two opposite C-C bonds of the ring. Carboxyl groups of adjacent mol-ecules are linked by pairs of hydrogen bonds around a centre of inversion; this inter-action gives rise to a chain that runs along [101].
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ژورنال
عنوان ژورنال: Acta Crystallographica Section C Crystal Structure Communications
سال: 2010
ISSN: 0108-2701
DOI: 10.1107/s0108270110042356