An effectively diamagnetic oximato-bridged asymmetric dinuclear copper(II) complex with a Cu(II)I bond

• Published in: Inorganica Chimica Acta Vol. 232; no. 1; pp. 125 - 130
• Main Authors: Chaudhuri, Phalguni, Winter, Manuela, Flörke, Ulrich, Haupt, Hans-Jürgen
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.04.1995
• Subjects: Copper complexes; Crystal structures; Diamagnetic complexes; Oximato-bridged complexes; Crystal structures; Oximato-bridged complexes; Diamagnetic complexes; Copper complexes
• ISSN: 0020-1693; 1873-3255
• DOI: 10.1016/0020-1693(94)04379-A

A new bis(oximato)-bridged dinuclear copper(II) complex containing an axial Cu(II)I bond with the formula [LCu(PyA) 2Cu(I)]ClO 4·CH 3CN ( 1) (where L = 1,4,7-tritrimethyl-1,4,7-triazacyclononane; PyA = monoanion of pyridine-2-aldoxine) has been characterized by IR, UV-Vis, variable temperature (81–283 K) magnetic susceptibility measurements. 1 crystallizes in the monoclinic system space group P2 1 n , with cell constants a= 8.304(2), b = 27.410(7), c = 13.975(5) A ̊ β = 93.48(2)° V = 3175(2) A ̊ and Z = 4 . The structure consists of oximato-bridged Cu IICu II(I) monocations and non-coordinated perchlorate anions. Both copper ions have a distorted square-pyramidal geometry with a Cu ⋯ Cu separation of 3.45 Å and Cu(II)I bond length of 2.74 Å. The copper centres are very strongly antiferromagnetically coupled, the singlet-triplet splitting being greater than 1000 cm −1.