Zerovalent platinum chemistry. Part V. Bistriphenylphosphineplatinum(0) quinone complexes

Abstract

Compounds of formula [Pt(PPh₃)₂(quinone)] where the quinone is 1,4-benzoquinone, 2,3,5,6-tetrachloro-1,4-benzoquinone-1,4-naphthoquinone, 3,4,5,6-tetrachloro-1,2-benzoquinone, 1,2-naphthoquinone, and 9,10-phenanthrenequinone have been synthetised. With 2,3,5,6-tetramethyl-1,4-benzoquinone a compound of formula {Pt(PPh₃)₂}₂(quinone) has been obtained. The type of bonding and the factors influencing the strength of the bond between Pt(PPh₃)₂ and the quinone moiety have been discussed on the basis of i.r., ¹H n.m.r. and electronic spectra.