Synthesis and crystal and molecular structure of a tetranuclear ‘pair-of-dimers’ nickel(II) Schiff base complex. Magnetism of the Cu4 analogue

Abstract

Newly designed ‘pair-of-dimers’ complexes of Ni^II and Cu^II have been synthesized by linking together two binuclear metal Schiff base moieties with an exogenous µ-di-3,5-dimethylpyrazolate bridge; antiferromagnetism in the Cu₄^II complex involves interaction between the coupled binuclear fragments but probably of an inter- rather than intra-molecular nature.