
TY  - JOUR
A1  - Smith, Graham 
A1  - White, Jonathan M. 
T1  - <emph type="2">Short Communication</emph>: Molecular Cocrystals of Carboxylic Acids: the Preparation of the 1: 1 Proton-Transfer Compounds of Creatinine with a Series of Aromatic Acids and the Crystal Structure of that with Pyrazine-2,3-dicarboxylic Acid
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 2001
VL  - 54
IS  - 2
SP  - 97
EP  - 100
KW  - 
UR  - https://doi.org/10.1071/CH01009 
N2  - The 1 : 1 proton-transfer compounds of creatinine with a series of aromatic carboxylic acids have been prepared and characterized using infrared spectroscopy and in one case with single-crystal X-ray crystallography. The acids are the mononitro-substituted benzoic acids 3,5-dinitrobenzoic acid, 5-nitrosalicylic acid, 3,5-dinitrosalicylic acid and pyrazine-2,3-dicarboxylic acid. The crystal structure of the compound with pyrazine-2,3-dicarboxylic acid, &#91;(C4H8N3O+)(C6H3N2O4&#8211;)&#93;, shows a chain structure based on a primary asymmetric cyclic hydrogen-bonding dimer formed through the carboxylate group and the hetero-nitrogen of the acid, and the protonated imine and the adjacent hetero-amine proton of creatinine. Peripheral extension is through the second imine proton to the second carboxylic acid group of an adjacent acid molecule. Manuscript received: 1 February 2001. 
ER  -

