Large-ring complexes of platinum and palladium of the type trans-[{MCl2[But 2P(CH2) n PBut 2]} x ]

Abstract

Large-ring (12- to 45-membered) complexes of the type trans-[{MCl2[But2P(CH2)nPBut2]x}](M = Pt or Pd; n= 8, 9, 10, or 12: x= 1–3) are formed by treating [MCl2(NCPh)2] with the flexible long-chain diphosphines. The mononuclear (x= 1) complexes of platinum are volatile and have also been studied by mass spectrometry. 1H and 31P N.m.r. data are given as are values of (M–Cl). Bond length and bond angle data for the binuclear complex [{PdCl2[But2P(CH2)10PBut2]}2], with a 26-membered ring, are also given.