Manganese azides based on co-ligands with a flexible tail: Diverse structural and magnetic properties

Three azido-bridged coordination polymers, namely [Mn(L-1)(N-3)(2)](n) (1), [Mn(L-2) (N-3)(2)](n) (2), and [Mn(L-3) (N-3)(2)](n) (3) [L-1 = N-(2-pyridylmethylene)methylamine, L-2 = N-(2-pyridylmethylene)methylamine, and L-3 = N-(2-pyridylmethylene)octylamine], have been synthesized with Schiff-base co-ligands with flexible tails, and their structures and magnetic properties characterized. Complex 1 is composed of one-dimensional, uniform chains with double end-on (EO) azido bridges, complex 2 consists of (6,3) net, layers in which double EO azido-bridged dimers are interlinked by single end-to-end (EE) azido bridges, and complex 3 contains chains of Mn-II ions bridged by alternating double EO and double EE azido bridges. Magnetically, 1 is a metamagnet built of ferromagnetic chains, 2 exhibits weak ferromagnetism due to spin canting, and 3 shows alternate ferro- and antiferromagnetic intrachain interactions. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheirn, Germany, 2006).