Abstract
Abstract Enantiomers of aminophenylmethanephosphonous acid have been obtained by resolution of the racemic acid using optically active isomers of 1-phenylethylamine. The crystal and molecular structures of the enantiomers of the acid monohydrate (C7H10PO2N·H2O) have been determined by single-crystal X-ray diffraction method. The crystals are monclinic, of space grup P212121 and Z = 4. Cell constants: a = 5.410(2) A, b = 6.603(2) A, c = 25.061(5) A for (+)-(R)-enantiomer and a = 5.414(2) A, b = 6.602(2) A, c = 25.056(5) A for (-)-(S)-enantiomer. The structures solved by direct method have been refined to final R = 0.033 and R = 0.029 respectively.
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