Minghetti, Giovanni and Doppiu, Angelino and Stoccoro, Sergio and Zucca, Antonio and Cinellu, Maria Agostina and Manassero, Mario and Sansoni, Mirella (2002) Reactivity of Ph2P(O)py-2 with platinum(II) alkyl derivatives 2 building-up of a chiral phosphorus atom through C,N-cyclometallation. European Journal of Inorganic Chemistry, Vol. 2002 (2), p. 431-438. eISSN 1099-0682. Article.
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The reaction of Ph2P(O)py-2 (HL) with methyl- and dimethylplatinum( II) derivatives afforded a series of six-membered C,N-cyclometallated species, [PtX(L9)(L)] (X=halide or Me; L9 = neutral ligand, e.g. SMe2, SOMe2, CO, PAr3) arising from activation of one C(sp2)-H bond of a phenyl substituent. The metallation entailed elimination of methane and caused the phosphorus atom to become chiral. The series includes the complex [Pt(Me)(CO)(L)] where the platinum atom is bonded to three different carbon atoms (Csp 3, Csp 2, Csp). From the neutral species cationic derivatives [Pt(L9)(L99)(L)]+ (L9 = SMe2, L99 = CH3CN; L9-L99 = dppe; L9 = SMe2 or SOMe2, L99 = H2O) could be obtained. The new complexes were isolated and fully characterised by elemental analyses and spectroscopic techniques (IR, NMR, FAB-MS). The solid-state structures of [PtCl(SMe2)(L)], [PtCl(CO)(L)], [Pt(Me)(SOMe2)( L)], and [Pt(SMe2)(H2O)(L)][BF4] were determined by single-crystal X-ray diffraction.
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