Tin(iv) halide complexes of AsPh3: The structures of trans-SnCl4(AsPh3)2 and SnBr4(AsPh3)·AsPh3†
Abstract
The structures of two 1 ∶ 2 adducts between tin(IV) halides and AsPh3 have been determined. SnCl4(AsPh3)2 adopts a six-coordinate geometry at tin in which the two organoarsine donors are mutually trans. In contrast, SnBr4(AsPh3)2 is five-coordinate at tin and only one arsine is directly bonded to the metal, in an axial site of the trigonal bipyramid. The second AsPh3 group has a close contact with the axially bound bromine [As⋯Br: 3.567(3)
Å], which is a unique structural variation that depicts an intermediate in a