TY - JOUR
T1 - Synthesis and magnetism of the first tetranuclear copper(II)-iron(III) complexes of macrocyclic oxamides
AU - Gao, En Qing
AU - Yang, Guang Ming
AU - Tang, Jin Kui
AU - Liao, Dai Zheng
AU - Jiang, Zong Hui
AU - Yan, Shi Ping
PY - 1999/12/10
Y1 - 1999/12/10
N2 - Four novel tetranuclear macrocyclic complexes of the formula [(CuLi)3Fe](ClO4)3·3H 2O (i=1-4, Li are the dianions of the [14]N4 and [15]N4 macrocyclic oxamides, namely 2,3-dioxo-5,6:13,14-dibenzo-7,12-bis(ethoxycarbonyl)-1,4,8,11- tetraazacyclotetradeca-7,11-diene, 2,3-dioxo-5,6:13,14-dibenzo-9-methyl-7,12-bis(ethoxycarbonyl)-1,4,8,11- tetraazacyclotetradeca-7,11-diene and 2,3-dioxo-5,6:14,15-dibenzo-7,13-bis(ethoxycarbonyl)-1,4,8,12- tetraazacyclotetradeca-7,12-diene] have been prepared and characterized. These complexes are the first examples of oxamido-bridged Cu(II)-Fe(III) heterometallic species. Cryomagnetic studies on [(CuL1)3Fe](ClO4)3·3H 2O (1) and [(CuL3)3Fe](ClO4)3·3H 2O (3) (77-300 K) revealed that the Cu(II) and Fe(III) ions interact antiferromagnetically through the oxamido bridge, with the exchange integral J=-30.8 cm-1 for 1 and J=-28.7 cm-1 for 3 based on Ĥ=-2J ∑ŜiŜj. The interaction parameters have been compared with that of the related [Cu3Mn] compound.
AB - Four novel tetranuclear macrocyclic complexes of the formula [(CuLi)3Fe](ClO4)3·3H 2O (i=1-4, Li are the dianions of the [14]N4 and [15]N4 macrocyclic oxamides, namely 2,3-dioxo-5,6:13,14-dibenzo-7,12-bis(ethoxycarbonyl)-1,4,8,11- tetraazacyclotetradeca-7,11-diene, 2,3-dioxo-5,6:13,14-dibenzo-9-methyl-7,12-bis(ethoxycarbonyl)-1,4,8,11- tetraazacyclotetradeca-7,11-diene and 2,3-dioxo-5,6:14,15-dibenzo-7,13-bis(ethoxycarbonyl)-1,4,8,12- tetraazacyclotetradeca-7,12-diene] have been prepared and characterized. These complexes are the first examples of oxamido-bridged Cu(II)-Fe(III) heterometallic species. Cryomagnetic studies on [(CuL1)3Fe](ClO4)3·3H 2O (1) and [(CuL3)3Fe](ClO4)3·3H 2O (3) (77-300 K) revealed that the Cu(II) and Fe(III) ions interact antiferromagnetically through the oxamido bridge, with the exchange integral J=-30.8 cm-1 for 1 and J=-28.7 cm-1 for 3 based on Ĥ=-2J ∑ŜiŜj. The interaction parameters have been compared with that of the related [Cu3Mn] compound.
KW - Copper(II)-Iron(III) complexes
KW - Macrocyclic compound
KW - Magnetism
KW - Oxamide
KW - Tetranuclear complexes
UR - https://www.scopus.com/pages/publications/0001289311
U2 - 10.1016/S0277-5387(99)00297-1
DO - 10.1016/S0277-5387(99)00297-1
M3 - 文章
AN - SCOPUS:0001289311
SN - 0277-5387
VL - 18
SP - 3643
EP - 3646
JO - Polyhedron
JF - Polyhedron
IS - 27
ER -