Synthesis and structural characterization of nickel(II) complexes of 3,14-diethyl-2,6,13,17-tetraazatricyclo[14,4,01.18,07.12]docosane with inorganic salts
摘要:
The square-planar complex [Ni(L3)]Cl-2 center dot 2H(2)O (1) (L1 = 3,14-diethyl-2,6,13,17-tetraazatricyclo[14,4,O-1.18,O-7.12]docosane) with inorganic salts KNO3 and NaN3 yields the octahedral nickel(II) complexes [Ni(L3)(NO3)(2)] (2) and [Ni(L3)(N-3)(2)] (3). The structures were characterized by X-ray crystallography, spectroscopic, thermogravimetry and cyclic voltammetry. The crystal structures of compounds 2 and 3 show that each nickel(II) centre has an elongated distorted octahedral geometry with the axial ligands. Electronic spectra and redox potentials of the complexes 2 and 3 reveal a high-spin octahedral environment, which is reflected by the nature of the axial ligands. The TGA behaviors of two compounds 2 and 3 are also significantly affected by the nature of the axial ligands. (C) 2015 Elsevier Ltd. All rights reserved.
Synthesis, Crystal Structures, and Magnetic Properties of Cyano-Bridged Honeycomblike Layers M<sup>V</sup>−Cu<sup>II</sup> (M = Mo, W) Chelated by a Macrocyclic Ligand
作者:Jeong Hak Lim、Jun Sung Kang、Hyoung Chan Kim、Eui Kwan Koh、Chang Seop Hong
DOI:10.1021/ic060868b
日期:2006.9.1
Cu(II)-M(V) [M = Mo (2), W (3)] complexes formed by self-assembly of octacyanometalates [M(CN)8]3- (M = Mo, W) with a new molecular precursor [Cu(L2)]2+ (1) (L2 = a macrocyclic ligand) in a 2:3 ratio have been investigated in terms of structures and magnetic behaviors. The M2Cu3 repeating unit of both bimetallic compounds is extended to a two-dimensional honeycomblike layered structure. The pendant