Acta Crystallographica Section C

Crystal Structure Communications

Volume 60, Part 6 (June 2004)

organic compounds

Acta Cryst. (2004). C60, o434-o437 [ doi:10.1107/S0108270104009497 ]

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

A. Visnjevac and L. Tusek-Bozic

Abstract: The crystal structures of the potential antitumour agents monoethyl ( [alpha] -anilinobenzyl)phosphonate, C₁₅H₁₈NO₃P, (I), and its 4-azobenzene-substituted derivative monoethyl { [alpha] -[4-(phenyldiazenyl)anilino]benzyl}phosphonate, C₂₁H₂₂N₃O₃P, (II), are described. A zwitterionic form of (I) and a neutral molecular form of (II) are observed, which is fully in accordance with previously reported spectroscopic studies. In both structures, hydrogen bonding induces the formation of zigzag head-to-head double layers parallel to the crystallographic b axis.

Formula: C₁₅H₁₈NO₃P and C₂₁H₂₂N₃O₃P


	Structure factor file (CIF format) (145.7 kbytes) Contains datablock I

	Structure factor file (CIF format) (204.7 kbytes) Contains datablock II

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