Facilitation of the substitution reactions of triangular platinum cluster compounds and the structural characterisations of [Pt3(µ-SO2)3P(C6H11)33] and [NEt4][Pt3(µ-Br)(µ-SO2)2P(C6H11)33] by single-crystal X-ray techniques - Simon Bott (J. Chem. Soc., Dalton Trans., 1988)