New unexpected coordination mode of azide acting as a bridging ligand between nickel(II) ions. Synthesis, crystal structure and magnetic properties of [Ni(N3)2(2,2-dimethylpropane-1,3-diarnme)]n, and infinite bidimensional polymer

Abstract

The reaction between aqueous solutions of Ni(ClO₄)₂, NaN₃ and 2,2-dimethylpropane-1,3-diamine (dmpd) gives blue crystals of the title compound which presents the N₃^– in a new coordination mode (end-to-end with respect to two Ni^II and end-on to another Ni^II), the crystal structure of which reveals a new infinite bidimensional sheet with anomalous magnetic behaviour at low temperature.