title: Two derivatives of (N-phenylthioureidoalkyl)phosphonates.
abstract: The structures of diphenyl [3-methyl-1-(3-phenylthioureido)butyl]phosphonate and diphenyl [2-methyl-1-(3-phenylthioureido)butyl]phosphonate, both C(24)H(27)N(2)O(3)PS, are reported. In both compounds, the thiourea moiety adopts a syn-syn conformation (i.e. the S-C-N-C torsion angles are synperiplanar), which enables N-H...O hydrogen bonds to be formed between centrosymmetrically related molecules. The geometries around the P atoms can be described as distorted tetrahedral. Some of the functional groups in each structure are disordered. The bulk of the different alkyl substituents between the amide and phosphonate groups influences the molecular conformation and crystal packing. Although the structures of these compounds and two related derivatives appear to be similar, they are not isostructural.
authors.affiliation: Department of Crystallography and Crystallochemistry, University of Łódź, Pomorska 149/153, 90-236 Łódź, Poland. lilach@krysia.uni.lodz.pl
authors.forename: Lilianna
authors.initials: L
authors.lastname: Checińska
authors.forename: Lesław
authors.initials: L
authors.lastname: Sieroń
authors.forename: Maria
authors.initials: M
authors.lastname: Bukowska-Strzyzewska
authors.forename: Zbigniew H
authors.initials: ZH
authors.lastname: Kudzin
authors.forename: László
authors.initials: L
authors.lastname: Fábián