Syntheses, Structures, and Magnetic Behavior of New Azide Linked Compounds with One- and Two-Dimensional Structures

Three azide based compounds were synthesized employing aliphatic amines as site blocking agents: [Ni(N-3)(C6H16N2)(2)]ClO4 (I) [C6H16N2 = N,N-diethylethylenediamine (DEDA)], [Cu-8(N-3)(16)(C6H18N4)(2)] (II) [C6H18N4 = tris(2-aminoethyl) amine (TREN)], and [Cu-7(N-3)(14)(C7H19N3)(2)]2H(2)O (III) [C7H19N3 = 3,3-diamino-N-methyldipropylamine (DMDA)]. The compounds I and II have one-dimensional structure and III has a two-dimensional structure. Compound I is a simple linear cationic Ni-azide chain and compound II has Cu-6 azide units forming a column terminated by the copper-metalloligand generated in-situ during the course of the reaction. The charge compensation perchlorate anions occupy spaces in between the chains in I. Compound II packs in a herringbone arrangement, which is not commonly observed in low-dimensional structures. Compound III has one-dimensional copper-azide chains connected through copper-metalloligand forming the two-dimensional structure. All the three compounds exhibit anti-ferromagnetic behavior.