TY - JOUR
T1 - Heterobinuclear copper(II)-nickel(II) complexes of macrocyclic oxamide with diamines and tetraazacyclam as blocking ligands
T2 - Synthesis, crystal structure and magnetic properties
AU - Tang, Jin Kui
AU - Si, Shu Feng
AU - Gao, En Qing
AU - Liao, Dai Zheng
AU - Jiang, Zong Hui
AU - Yan, Shi Ping
PY - 2002/4/17
Y1 - 2002/4/17
N2 - Three novel oxamido-bridged heterobinuclear copper(II)-nickel(II) complexes derived from macrocylic oxamido compound with diamines and tetraazacyclam as blocking ligands were synthesized and characterized by IR, ESR and electronic spectra. Their formula is [Cu(L)Ni(en)2](ClO4)2·0.5C 2H5OH·H2O (1), [Cu(L)Ni(tmd)2](ClO4)2·4H 2O (2) and [Cu(L)Ni(rac-cth)](ClO4)2·CH3OH (3), where L=1,4,8,11-tetraazacyclotradecanne-2,3-dione, en=1,2-diaminoethande, tmd=1,3-diaminopropane and rac-cth is rac-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane. The crystal structures of the three complexes have been determined. The structures consist of binuclear units in which the copper(II) ion is in a square-planar environment and linked to the nickel(II) ion via the exo-cis oxygen atoms of the oxamido macrocyclic ligand, with Cu···Ni separations of 5.311 (1), 5.420 (2) and 5.307 Å (3), respectively. The temperature dependence of the magnetic susceptibility for 1, 2 and 3 was analyzed by means of the Hamiltonian Ĥ=-2JŜNiŜCu, leading to J=-52.8, -45.7 and -56.9 cm-1 for 1, 2 and 3, respectively.
AB - Three novel oxamido-bridged heterobinuclear copper(II)-nickel(II) complexes derived from macrocylic oxamido compound with diamines and tetraazacyclam as blocking ligands were synthesized and characterized by IR, ESR and electronic spectra. Their formula is [Cu(L)Ni(en)2](ClO4)2·0.5C 2H5OH·H2O (1), [Cu(L)Ni(tmd)2](ClO4)2·4H 2O (2) and [Cu(L)Ni(rac-cth)](ClO4)2·CH3OH (3), where L=1,4,8,11-tetraazacyclotradecanne-2,3-dione, en=1,2-diaminoethande, tmd=1,3-diaminopropane and rac-cth is rac-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane. The crystal structures of the three complexes have been determined. The structures consist of binuclear units in which the copper(II) ion is in a square-planar environment and linked to the nickel(II) ion via the exo-cis oxygen atoms of the oxamido macrocyclic ligand, with Cu···Ni separations of 5.311 (1), 5.420 (2) and 5.307 Å (3), respectively. The temperature dependence of the magnetic susceptibility for 1, 2 and 3 was analyzed by means of the Hamiltonian Ĥ=-2JŜNiŜCu, leading to J=-52.8, -45.7 and -56.9 cm-1 for 1, 2 and 3, respectively.
KW - Crystal structures
KW - Cu-Ni
KW - Macroycyclic oximide
KW - Magnetism
UR - https://www.scopus.com/pages/publications/0037123130
U2 - 10.1016/S0020-1693(02)00730-2
DO - 10.1016/S0020-1693(02)00730-2
M3 - 文章
AN - SCOPUS:0037123130
SN - 0020-1693
VL - 332
SP - 146
EP - 152
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
IS - 1
ER -