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Abstract
Two new nickel(II) trans-monodimensional end-to-end azide-bridged complexes were synthesized and characterized: [Ni(1,3-diamino-2,2-dimethylpropane)2(μ-N3)]n(PF6)n (1) and [Ni(1,3-diaminopropane)2(μ-N3)]n(PF6)n (2). The crystal structures of 1 and 2 were solved. Complex 1 crystallizes in the orthorhombic system, space group Pnmn with a = 18.046(6) A, b = 8.7050(12) A, c = 6.139(2) A, and Z = 2. Complex 2 crystallizes in the orthorhombic system, space group Pnmn with a = 15.186(3) A, b =8.808(2) A, c = 5.983(2) A, and Z = 2. In the two complexes, the chains run along the c axis and the nickel atoms are situated in similar distorted octahedral environments. The two complexes are very similar and may be described as one-dimensional systems with the azido bridging ligands in the trans position. The magnetic properties of the two compounds were studied by susceptibility measurements vs temperature. 1 and 2 show a discontinuity at 235 and 230 K, respectively, which may be attributed to a phase transition at th...
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