Solvothermal synthesis, crystal structure and magnetic property of a new dinuclear manganese(II)-azido complex:: [Mn(2,2′-dpa)(N3)2]2 (2,2′-dpa=2,2′-dipicolylamine)

A new dinuclear manganese(II)-azido complex: [Mn(2,2'-dpa)(N-3)(2)](2) 1 (2,2'-dpa = 2,2'-dipicolylamine) has been synthesized solvothermally. X-ray crystallography analysis reveals that it consists of two crystallographically independent dimeric manganese moieties; each manganese(II) atom is coordinated by one 2,2'-dipicolylamine, one terminal azido ligand, and double end-on bridging azido ligands, exhibiting a slightly distorted octahedral sphere. There are extensive short contacts among dimeric manganese moieties, which extend the structure into an interesting three-dimensional supramolecular array. Magnetic determination of 1 indicates that dominant ferromagnetic interaction and weak antiferromagnetic interaction, which are ascribed to the end-on azido bridges and the short contacts, respectively, co-exist in this complex. (C) 2004 Elsevier B.V. All rights reserved.