
TY  - JOUR
A1  - Smith, Graham 
A1  - Baldry, Katherine E. 
A1  - Byriel, Karl A. 
A1  - Kennard, Colin H. L. 
T1  - Molecular Cocrystals of Carboxylic Acids. XXV The Utility of Urea in Structure Making with Carboxylic Acids and the Crystal Structures of a Set of Six Adducts with Aromatic Acids
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1997
VL  - 50
IS  - 7
SP  - 727
EP  - 736
KW  - 
UR  - https://doi.org/10.1071/C96199 
N2  - Molecular adducts of urea with six aromatic carboxylic acids have been prepared and characterized by using X-ray diffraction methods and infrared spectroscopy. These compounds are with 5-nitrosalicylic acid &#91;(C7H5NO5)2(CH4N2O)&#93; (1), 3,5-dinitrosalicylic acid &#91;(C7H4N2O7)(CH4N2O)&#93; (2), 4-aminobenzoic acid &#91;(C7H7NO2)2(CH4N2O)&#93; (3), o-phthalic acid &#91;(C8H6O4)(CH4N2O)&#93; (4), pyrazine-2,3-dicarboxylic acid &#91;(C4H4N2O4)(CH4N2O)&#93; (5) and pyridine-2,6-dicarboxylic acid &#91;(C7H5NO4)(CH4N2O)2&#93; (6). In the majority of the adducts, all six potential interactive sites on the urea molecules are utilized in hydrogen bonding, giving polymeric structures. 
ER  -

