AbstractCompounds cis-[Pt(PPh3)2(3-X-C6H4)2] [X = F, Cl, CF3, CH3O, (CH3)2N] and cis- [Pt(PPh3)2(3-X-C6H4)(Y-C6H4)] [X = F / Y = H, 4-F, 4-CF3, 4-CH3O; X = Cl/Y = 4-F; X = CF3 /Y = 4-F; X = CH3O/Y = 4-F] have been synthesized and studied thermally with respect to the reductive elimination of disubstituted biphenyls. Activation parameters ⊿H≠ and ⊿S≠ are reported and discussed.

Abstract The Compounds cis-[Pt(PPh3)2(4-X-C6H4)2] [X = F, Cl, CF3, OCH3, N(CH3)2] and cis-[Pt(PPh3)2(4-X-C6H4)(Y-C6H4)] [X = F/Y = 3 Cl, 4-C1, 3-CH3O, 4-CH3O; X = CF3/Y = 3-F, 4-F] have been synthesized and studied thermally with respect to the reductive elimination of disubstituted biphenyls. Activation parameters ⊿H≠ and ⊿ S≠ are reported and discussed.

Abstract19F NMR chemical shifts of 14 fluorine substituted cis-Bis(phenyl)bis(triphenylphos-phane)platinum(II) compounds are discussed with respect to dπpπ-interactions between platinum and sp2 -hybridized carbon.