Synthesis and magnetism of binuclear cobalt(II) complexes with the tetraacetylethene dianion as a bridging ligand

Jingmin Shi*, Jiqing Xu, Renzhang Wang, Guoyu Yang, Haoran Sun, Tiegang Wang, Peng Cheng, Daizheng Liao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)629-630
Number of pages2
JournalTransition Metal Chemistry
Volume23
Issue number5
DOIs
Publication statusPublished - 1998
Externally publishedYes

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