Abstract
New preparative procedures have been developed for the formation of the platinum(IV) complexes [PtXMe3{MeE(CH2)nE′Me}](X = Cl, Br, or l; n= 2 or 3; E,E′= S or Se), and 195Pt, 77Se, and 13C n.m.r. data obtained. Deductions on the relative stabilities of the complexes with varying ring size and chalcogen have been made on the basis of the values of 1J(PtC) and 1J(PtSe). These deductions are supported by chemical evidence. Correlations exist between 195Pt chemical shifts and the strength of the Pt–Se bond, with weaker bonds leading to greater deshielding at the Pt nucleus.
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