Tridentate (NNO) Schiff-base copper(II) complex: synthesis, crystal structure, and magnetic study

Abstract

A new azido adduct of a tridentate Schiff-base copper(II) complex has been synthesized and characterized structurally and magnetically. X-ray single crystal structure analysis reveals that the asymmetric unit of [Cu₂(L)₂(µ_1,1-N₃)₂][Cu(L)(N₃)] (1) [HL = 1-(N-ortho-hydroxyacetophenimine)-2,2-diethyl-aminoethane] has two independent moieties. One of these forms a dimer, containing end-on azido bridges, with its center of inversion related equivalents. The complex crystallizes in monoclinic space group P₂1/c with a = 10.112(2), b = 31.938(4), c = 9.718(2) Å and β = 95.00(2)°. Variable temperature magnetic susceptibility data show antiferromagnetic interactions between copper(II) centers.

Keywords:

• Crystal structure
• Tridentate Schiff-base ligand
• Copper(II) azide complex
• Antiferromagnetism

Acknowledgments

The work was financially supported by the University Grants Commission, New Delhi, by a grant (F.12-9/2002(SR-I)) to SK. We are grateful to RSIC, CDRI, Lucknow, for elemental analyses (on a chargeable basis). Assistance from CAS, Department of Chemistry, is statutorily acknowledged.