A novel mu(4)-oxo bridged copper tetrahedron derived by self-assembly: first example of double helical bis(tridentate) coordination of a hexadentate amine phenol ligand

Manindranath Bera; Wing Tak Wong; Guillem Aromi; Joan Ribas; Debashis Ray

doi:10.1021/ic049817+

A novel mu(4)-oxo bridged copper tetrahedron derived by self-assembly: first example of double helical bis(tridentate) coordination of a hexadentate amine phenol ligand

Inorg Chem. 2004 Aug 9;43(16):4787-9. doi: 10.1021/ic049817+.

Authors

Manindranath Bera¹, Wing Tak Wong, Guillem Aromi, Joan Ribas, Debashis Ray

Affiliation

¹ Department of Chemistry, Indian Institute of Technology, Kharagpur 721 302, India.

PMID: 15285644
DOI: 10.1021/ic049817+

Abstract

In methanol, the reaction of Cu(ClO(4))(2).6H(2)O and the hexadentate amine phenol ligand (H(2)bahped) in the presence of triethylamine affords a tetranuclear copper(II) complex having the formula [Cu(4)(mu(4)-O)(bahped)(2)](ClO(4))(2). The X-ray structure of this complex shows a tetrahedral central [Cu(II)(4)(mu(4)-O)]unit coordinated to two hexadentate bridging (via the central ethylenediamine part) ligands. The compound is the first example of a mu(4)-oxo tetranuclear copper(II) complex without any bridging ligand along the six tetrahedral edges. Variable-temperature magnetic data clearly show an S(t) = 0 spin ground state for antiferromagnetic interactions between four (2)B(2) copper(II) ions in a dimer of dimers.