Tetra-para-tolylantimony derivatives (4-MeC6H4)4SbX, X = OC(O)C6H4(NO2-2), OC(O)C≡CPh, ON=CHC6H4(NMe2-4): Synthesis and structure

Abstract

Tetra-para-tolylantimony derivatives (4-MeC₆H₄)₄SbX, X = OC(O)C₆H₄(NO₂-2) (I), OC(O)C≡CPh (II), ON=CHC₆H₄(NMe₂-4) (III)) have been synthesized by the reaction between penta-para-tolylantimony and 2-nitrobenzoic and phenylpropiolic acids and 4-dimethylaminobenzaldoxime in benzene. Using X-ray diffraction, it has been established that the Sb atoms in molecules of complexes I–III are in distorted trigonal bipyramidal coordination to X groups in axial positions. The Sb–O bond lengths are 2.2797(16) (I), 2.2925(17) (II), and 2.1357(17) Å (III). The CSbO axial angles are 178.28(7)° (I), 178.57(9)° (II), 176.09(8)° (III).