Terminal phosphido-complexes of co-ordinatively saturated and unsaturated platinum(II)

Abstract

Reactions of [Pt{PPh(CH₂CH₂PPh₂)₂}Cl]Cl or [Pt{P(CH₂CH₂PPh₂)₃}Cl]Cl with PR₂H (R = Ph or C₆H₁₁) and TI(O₃SCF₃) give secondary phosphine complexes [Pt{PPh(CH₂CH₂PPh₂)₂}(PR₂H)][O₃SCF₃]₂ or [Pt{P(CH₂CH₂PPh₂)₃}](PR₂H)][O₃SCF₃]₂. The corresponding terminal phosphido complexes were prepared by deprotonation with aqueous KOH or Na[N(SiMe₃)₂]. The new complexes were characterised by ³¹P and ¹⁹⁵Pt n.m.r. spectroscopy. Phosphorus-31 n.m.r. spectra indicate that the geometry at the terminal phosphido phosphorus is pyramidal.