Rhomboidal [Cu 4 ] coordination cluster from self-assembly of two asymmetric phenoxido-bridged Cu 2 units: Role of μ 1,1 -azido clips

Abstract

The coordination cluster [Cu 2 (μ-OMe)(μ 1,1-N 3)(μ-bcp)(N 3)] 2 (1; Hbcp = 2,6-bis(2-benzoyl-4chloro-phenylimino)-methyl)-4-methylphenol, forming a new member within the rapidly growing family of Cu 4 cluster complexes, has been synthesized and structurally characterized by X-ray crystallography. The complex crystallizes in the monoclinic system, space group P2 1 /c, with unit cell parameters a = 14.620(7) Å, b = 17.923(8) Å, c = 15.008(7) Å, β = 115.815(14) • and Z = 2. It is the first example of a rhomboidal [Cu 4 ] compound formed from μ 1,1-azido clipping of two methoxido bridged [Cu 2 ] complexes showing asymmetric coordination from benzophenone oxygen atoms and terminal azido groups.