Tris(3-Fluorophenyl)antimony Derivatives (3-FC6H4)3Sb(OC6H3Br2-2,4)2, (3-FC6H4)3Sb(OC6Cl5-2,3,4,5,6)2, and (3-FC6H4)3Sb[OC(O)C6H4(NO2-2)]2: Synthesis and Structure

Tris(3-fluorophenyl)antimony bis(2,4-dibromophenoxide) (I), tris(3-fluorophenyl)antimony bis(pentachlorophenoxide) (II), and tris(3-fluorophenyl)antimony bis(2-nitrobenzoate) (III) have been synthesized by the reaction of tris(3-fluorophenyl)antimony with 2,4-dibromo- and 2,3,4,5,6-pentacholophenols and 2-nitrobenzoic acid in the presence of tert-butylperoxide. The antimony atoms in complexes I–III have a distorted trigonal bipyramidal coordination with aroxides (carboxyl) groups in axial positions (OSbO angles, 176.0(2)° (I), 174.89(7)° (II), 173.04(8)° (III); Sb–O distances, 2.057(5), 2.048(5) Å (I); 2.098(2), 2.106(2) Å (II); 2.120(6), 2.090(6) Å (III)).