摘要:
One 0D monomer trans-[Ni(pn)(2)(dca)(2)] (1), one neutral 2D polymer [Ni(pn)(dca)(2)](n) (2) and one polycationic 1D polymer [Ni(pn)(2)(dca)](n)(PF6)(n) (3) (pn = 1,3-propanediamine; dca = dicyanamide) have been synthesized and X-ray crystallographically characterized. 1 has terminal trans-Ni(dca)(2) unit, 2 contains both double bridged Ni-(NCNCN)(2)-Ni and single bridged Ni-(NCNCN)-Ni units in alternate fashion and 3 consists of single Ni-(NCNCN)-Ni bridge by covalent bonds. The nickel(II) centers are six-coordinated with distorted octahedral geometry. Multiple lateral N-H center dot center dot center dot N, C-H center dot center dot center dot N, N-H center dot center dot center dot F and C-H center dot center dot center dot F hydrogen bondings promote dimensionality. Variable-temperature magnetic measurements indicate weak antiferromagnetic interactions through mu(1,5) bridge(s). (C) 2010 Elsevier B.V. All rights reserved.