Crystal and molecular structure of dicopper bis-(3-amino-5-methylisoxazole)tetraacetate [Cu-2(mu-OCOCH3)(4)L-2]

It was established by X-ray diffraction analysis that in the dimer complex of 3-amino-5-methylisoxazole (L) [Cu-2(mu -OCOCH3)(4)L-2] the coordination bond is localized at the endocyclic pyridine type N atom. Arguments are giv en against other possible types of coordination in aminoisoxazole complexes conjectured from IR spectroscopy data in a number of publications. The dim er structure of the complex agrees with antiferromagnetic data (2J = -280 c m(-1)).