Tribenzylbis(triphenyl-arsine oxide-κO)tin(IV) tetra-phenyl-borate

The crystal structure of the title salt, [Sn(C(7)H(7))(3)(C(18)H(15)AsO)(2)][B(C(6)H(5))(4)], consists of discrete cations and anions; the tin atom of the cation is five-coordinated in a distorted trans-C(3)SnO(2) trigonal-bipyramidal geometry [summation of C-Sn-C angles 360.0 (3)° and O-Sn-O angle 173.1 (1)°]. The structure contains voids of 113 (19) Å(3), but no solvent mol-ecule could reasonably be located there.