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[Bu^t ₂P(CH₂)_nPBu^t ₂]_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[Bu^t ₂P(CH₂)₁₀PBu^t ₂]}₂], with a 26-membered ring, are also given.