Crystalline modifications of tetra-(p-tolyl)antimony benzene sulfonate

Two structural isomers (I and II) have been obtained via the crystallization of tetra-(p-tolyl)antimony benzene sulfonate from toluene or water. The antimony atom in compound I has a distorted trigonal bipyramidal coordination to the carbon and oxygen atoms in axial positions (Sb-C, 2.097(11) (eq.), 2.103(10) (eq.), 2.111(10) (eq.), 2.139(10) (ax.) Å; Sb-O, 2.400(7) Å; OSbC, 176.9(3)°, C_eqSbC_eq, 115.3(4)°, 118.7(4)°, 119.1(4)°). A crystal of compound II is built of tetrahedral tetra-(p-tolyl)stibonium cations (Sb-C, 2.097(2), 2.097(2), 2.105(2), 2.106(3) Å; CSbC, 104.68(9)°-117.25(9)°) and benzene sulfonate anions (S-O, 1.439(2), 1.451(2), 1.454(2) Å; OSO, 112.82(15)°-113.70(16)°; OSC, 104.74(13)°-105.78(12)°).