cyclo-Tetra-kis-(μ-2,4,6-tri-methyl-phenyl-κ C 1:κ C 1)bis-(tri-methyl-phosphane)-1κ P,3κ P-tetra-copper(I)

Abstract

The title compound, [Cu₄(C₉H₁₁)₄(C₃H₉P)₂] or [Cu₄(Mes)₄(PMe₃)₂] (Mes = 2,4,6-tri-methyl-phenyl), was synthesized from copper(I) mesityl and tri-methyl-phosphane in THF as solvent. The mol-ecular structure of the complex has C ₂ symmetry and consists of four copper(I) atoms bridged by four μ-mesityl groups, giving an eight-membered puckered {Cu₄C₄} ring. Additionally, two copper(I) atoms at opposite corners of the Cu₄ rhomb are each linked to a terminal PMe₃ ligand. The PMe₃-bearing copper(I) atoms exhibit a distorted trigonal-planar coordination mode whereas the remaining Cu atoms linked to two mesityl groups are nearly linearly coordinated.

Keywords: complex; copper; crystal structure; phosphine.