Magnetic Properties and Crystal Structure of an Acetate-bridged Ferromagnetic Copper(II) Dimer

Abstract

The synthesis, crystal structure, and magnetic properties are reported for an unusual acetate-bridged copper(II) dimer. In the complex [Cu(L)CH3COO]2·H2O·C 2H5OH, where LH = N-(1,1-dimethyl-2-hydroxyethyl)salicylaldimine, the two coppers are connected by a single atom bridge through the acetate oxygen. The dimer is not centrosymmetric, and therefore the two Cu-O-Cu bridges are dissimilar. The pathways consist of a large (antiferromagnetic) and a small (ferromagnetic) bridging angle. Although a net antiferromagnetism is predicted, a ferromagnetic interaction is observed from magnetic susceptibility measurements. The reasons for this are discussed. The ΔMs = 2 transition was observed in the EPR spectra at 77 and 4 K. Magnetic data are g = 2.078 and J = 0.63 cm-1. Crystal data are as follows: space group P21/n, Z = 4, a = 10.587 (3) Å, b = 16.972 (8) Å, c = 18.432 (6) Å, β = 97.37 (2)°, V = 3285 Å3, R = 5.2% after full-matrix least-squares refinement of 3472 intensities, collected by counter methods. © 1981 American Chemical Society.

Department(s)

Chemistry

International Standard Serial Number (ISSN)

0020-1669

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1981 American Chemical Society (ACS), All rights reserved.

Publication Date

01 Jan 1981

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