TY - JOUR
T1 - Synthesis and magnetism of binuclear cobalt(II) complexes with the tetraacetylethene dianion as a bridging ligand
AU - Shi, Jingmin
AU - Xu, Jiqing
AU - Wang, Renzhang
AU - Yang, Guoyu
AU - Sun, Haoran
AU - Wang, Tiegang
AU - Cheng, Peng
AU - Liao, Daizheng
PY - 1998
Y1 - 1998
N2 - Three novel binuclear CoIIcomplexes, [Co2(TAE)-(phen)4](ClO4)2 · 3H2O(1),[Co2(TAE)(Nphen)4](ClO 4)2 · 4H2O(2) and [CO2(TAE)(bipy)4](ClO4)2 · H2O(3) (TAE = tetraacetylethene dianion, phen = 1,10-phenanthroline, Nphen = 5-nitro·1,10-phenanthroline, bipy = 2,2′-bipyridyl), have been synthesized and characterized by elemental analysis, i.r., molar conductance and electronic reflection spectra. The complexes are proposed to contain tetraacetylethene dianion bridged structures and two CoII ions. The variable-temperature magnetic susceptibility of complex (1) was measured in the 4-300 K range. The magnetic coupling parameter is consistent with antiferromagnetic exchange between the two CoII centres and the data fit a binuclear magnetic exchange model based on the Hamiltonian operator (Ĥ = -2JŜ1Ŝ2, S1 = S2 = 3/2), giving the antiferromagnetic coupling parameter of 2J = -1.55 cm-1.
AB - Three novel binuclear CoIIcomplexes, [Co2(TAE)-(phen)4](ClO4)2 · 3H2O(1),[Co2(TAE)(Nphen)4](ClO 4)2 · 4H2O(2) and [CO2(TAE)(bipy)4](ClO4)2 · H2O(3) (TAE = tetraacetylethene dianion, phen = 1,10-phenanthroline, Nphen = 5-nitro·1,10-phenanthroline, bipy = 2,2′-bipyridyl), have been synthesized and characterized by elemental analysis, i.r., molar conductance and electronic reflection spectra. The complexes are proposed to contain tetraacetylethene dianion bridged structures and two CoII ions. The variable-temperature magnetic susceptibility of complex (1) was measured in the 4-300 K range. The magnetic coupling parameter is consistent with antiferromagnetic exchange between the two CoII centres and the data fit a binuclear magnetic exchange model based on the Hamiltonian operator (Ĥ = -2JŜ1Ŝ2, S1 = S2 = 3/2), giving the antiferromagnetic coupling parameter of 2J = -1.55 cm-1.
UR - http://www.scopus.com/inward/record.url?scp=33847243803&partnerID=8YFLogxK
U2 - 10.1023/A:1006938303306
DO - 10.1023/A:1006938303306
M3 - Article
AN - SCOPUS:33847243803
SN - 0340-4285
VL - 23
SP - 629
EP - 630
JO - Transition Metal Chemistry
JF - Transition Metal Chemistry
IS - 5
ER -