Synthesis and structure of [(μ4-succinato)hexadecaphenyltetraantimony] triiodide solvate with benzene [(Ph4Sb)2O2CCH2CH2CO2(Ph4Sb)2][I3]2 · 4PhH

Abstract

The reaction of bis(tetraphenylantimony) succinate with iodine in benzene affords [(μ₄-succinato) hexadecaphenyltetraantimony] triiodide solvate with benzene [(Ph₄Sb)₂O₂CCH₂CH₂-CO₂(Ph₄Sb)₂][I₃]₂ · 4PhH (I). The symmetrically nonequivalent Sb(1) and Sb(2) atoms in the centrosymmetric cation of compound I have a distorted trigonal bipyramidal coordination mode with the oxygen atoms in the axial positions (Sb(1,2)−O 2.347(4) 2.525(4) Å; Sb(1,2)−C_equiv 2.109(7)−2.120(7) Å, 2.082(5)−2.106(7) Å; Sb(1,2)−C_axial 2.158(7), 2.121(9) Å; angles OSb(1,2)C 178.8(2)°, 174.5(3)°). The geometry of the [I₃]⁻ anions is close to linear (angle III 179.41(4)°, I−I distances 2.880(1) and 2.921(1) Å) (CIF file CCDC no. 1486690).