engleski

Two types of monoethyl alpha-anilinobenzylphosphonates: a zwitterion and a molecular compound

The crystal structures of the potential anti-tumour agents monoethyl (alpha-anilino-N-benzyl)phosphonate (I) and its 4-azobenzene-substituted derivative monoethyl [alpha- (4-benzeneazoanilino) -N-benzyl]phosphonate (II) are described. The zwitterionic form of (I) and the neutral molecular form of (II) were observed, which is fully in accordance with the previously reported spectroscopic studies. In both structures hydrogen bonding induces the formation of the zig-zag head-to-head double layers parallel to the crystallographic b axis.

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