Coordination chemistry of P-rich phosphanes and silylphosphanes - XXI - The influence of the PR3 ligands on formation and properties of the phosphinophosphinidene complexes [{eta(2)-(Bu2P)-Bu-t-P}Pt(PR3)(2)] and [{eta(2)-(Bu2P1)-Bu-t-P-2}Pt((PR3)-R-3)((PR)-R-4 '(3))]

(R3P)(2)PtCl2 and C2H4 yield the compounds [{eta(2)-C2H4}Pt(PR3)(2)] (PR3 = PMe3, PEt3, PPkEt(2), PPh2Et, PPh2Me, (PPh2Pr)-Pr-i, (PPh2Bu)-Bu-t and P(p -Tol)(3)); which react with (Ru2P)-Ru-t-P=(PMeBu2)-Bu-t to give the phosphi nophosphinidene complexes [{eta(2)-(Bu2P)-Bu-t-P}Pt(PMe3)(2)], [{eta(2)-(Bu 2P)-Bu-t-P}Pt(PEt3)(2)], [{eta(2)-(BuP)-Bu-t-P-2-P}Pt(PPhEt2)(2)], [{eta(2) -(Bu2P)-Bu-t-P}Pt(PPh2Et)(2)], [{eta(2)-(Bu2P)-Bu-t-P}Pt(PPh2Me)(2)], [{eta (2)-(Bu2P)-Bu-t-P}Pt((PPh2Pr)-Pr-i]. [{eta(2)-(Bu2P)-Bu-t-P}Pt((PPh2Bu)-Bu- t)(2)] and [{eta(2)-(Bu2P)-Bu-t-P}Pt(P(p-Tol)(3))(2)] [{eta(2)-(Bu2P)-Bu-t- P}Pt(PPh3)(2)] reacts with PMe3 and PEt3 as well as with (Bu2PMe)-Bu-t, (PP r3)-Pr-i and P(c-Hex)(3) by substituting one PPh3 ligand to give [{eta(2)-( Bu2P1)-Bu-t-P-2}Pt((PMe3)-Me-3)((PPh3)-Ph-4)], [{eta(2)-(Bu2P1)-Bu-t-P-2}Pt ((PPh3)-Ph-3)((PMe3)-Me-4)], [{eta(2)-(Bu2P1)-Bu-t-P-2}Pt((PEt3)-Et-3)((PPh3)-Ph-4)], [{eta(2)-(Bu2P1)-B u-t-P-2}Pt((PMeBu2)-Me-3-Bu-t)((PPh3)-Ph-4)], [{eta(2)-(Bu2P1)-Bu-t-P-2}Pt( (PPr3)-Pr-3i)((PPh3)-Ph-4)] and [{eta(2)-(Bu2P1)-Bu-t-P-2}Pt(P-3(c-Hex)(3)) ((PPh3)-Ph-4)]. With (Bu2PMe)-Bu-t, [{eta(2)-(Bu2P)-Bu-t-P}Pt(P(p-Tol)(3))( 2)] forms [{eta(2)-(Bu2P1)-Bu-t-P-2}Pt((PMeBu2)-Me-3-Bu-t) (P-4(p-Tol)(3))] . The NMR data of the compounds are given and discussed with respect to the influence of the PR3 ligands.