Acta Cryst. (2010). E66, o2146-o2147  [ doi:10.1107/S1600536810029703 ]

Triethylammonium O-3-cholest-5-en-3-yl (4-methoxyphenyl)dithiophosphonate

H. Van Der Walt, A. Muller and W. E. van Zyl

Abstract: In the crystal structure of the title compound, C₆H₁₆N⁺·C₃₄H₅₂O₂PS₂^- or [(CH₃CH₂)₃NH]⁺·[C₃₄H₅₂O₂PS₂]^-, the cation and anion are paired via weak, intermolecular, bifurcated N-H(S,S) hydrogen bonds. The cholesteryl units form an alternating (herringbone) motif as well as an infinitely stacked layered structure along the b axis. The P-S bond lengths [1.975 (2) and 1.981 (2) Å compared with ca 1.92 Å for a formal P=S double bond and with ca 2.01 Å for a P-S single bond] suggest delocalization of the negative charge between the P-S bonds. A distorted tetrahedral geometry around the P atom is revealed by non-ideal O-P-C and S-P-S bond angles of 96.7 (2) and 115.52 (11)°, respectively.

Online 31 July 2010

Copyright © International Union of Crystallography
IUCr Webmaster