Tetra(para-Tolyl)antimony aroxides (4-MeC6H4)4SbOAr (Ar = C6H3Cl2-2,6, C6H3(NO2)2-2,4, and C6H2(NO2)3-2,4,6): Syntheses and structures

Abstract

Tetra(para-tolyl)antimony aroxides, [(4-MeC₆H₄)₄SbOC₆H₃Cl₂-2,6] • 1/2TolH (IА, IВ), (4-MeC₆H₄)₄SbOC₆H₃(NO₂)₂-2,4 (II), and (4-MeC₆H₄)₄SbOC₆H₂(NO₂)₃-2,4,6 (III), are synthesized by the reactions of penta-para-tolylantimony with 2,6-dichlorophenol, 2,4-dinitrophenol, and 2,4,6-trinitrophenol, respectively, in toluene. The structures of the synthesized compounds are determined by X-ray diffraction analysis (CIF files CCDC 1050584 (I), 1433797 (II), and 999305 (III)). The Sb atoms in compounds IА, IВ, and II have a distorted trigonal bipyramidal coordination with the aroxy groups in the axial positions (axial angles CSbO are 178.01(6)°, 177.74(7)°, and 174.42(11)° and Sb–O angles are 2.244(1), 2.230(2), and 2.507(3) Å). In crystal III, the CSbC angles in the tetrahedral cation [(4-MeC₆H₄)₄Sb]⁺ are 103.6(2)°–116.22(2)°. A weak interaction is observed between the cation and picrate anion [OC₆H₂(NO₂)₃-2,4,6]^–(Sb···O distance is 3.472(3) Å).