New complexes of platinum(0) with cyclopropenes

Abstract

New cyclopropene complexes of platinum have been synthesised with a variety of bulky substituents on all positions of the cyclopropene ring. Two of these novel complexes, [Pt(3,3-Ph₃C₃H₂)(PPh₃) ₂] and [Pt(1,2-Ph₂C₃H₂)(PPh₃) ₂], have been structurally characterised by X-ray analysis. Both contain a cyclopropene ring which has remained intact upon complexation. The bond lengths within the complexes are remarkably independent of the substituents. The structural characteristics and the ³¹P NMR spectra of these complexes are discussed in detail.

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