Tetranuclear nickel(II) complexes with genuine mu 3-1,1,3 and mu 4-1,1,3,3 azide bridges

Abstract

Unique tetranickel(II) complexes have been synthesized which incorporate genuine mu(3)-1,1,3 or mu(4)-1,1,3,3 bridging azido ligands. Identification of two distinct isomeric mu(4)-1,1,3,3 binding modes confirms the structural flexibility of the quadruply bridging azide.