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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 20, Number 2
BKCSDE 20(2)
February 20, 1999 

 
Title
Trinuclear Complexes M[Co(en)2(SO3)2]2(H2O)2·4H2O (M=Mn, Fe, Co, Ni, Cu, Zn): Their Utilization for Stoichiometric Spinel Oxides and the Crystal Structure of Ni[Co(en)2(SO3)2]2(H2O)2·4H2O
Author
Kun-Pyo Hong, Hee Sook Park, Young-Uk Kwon
Keywords
Abstract
Trinuclear complexes of the eeneral formula M[Co(en)2(SO3)2]2(H2O)2·4H2O (M=Mn, Fe, Co, Ni, Cu, Zn) were synthesized. The crystal structure of one of the compounds in the series, Ni[Co(en)2(SO3)2]2(H2O)2·4H2O were determined by single crystal X-ray diffraction studies. It crystallizes in a monoclinic unit cell (a=10.079(l), b=l1.560(l), c=12.699(l) Å, β=101.8(1)°, V=1448.4(2) Å3). In the structure, a nickel atoms is bonded to two [Co(en)2(SO3)2]-1 through the oxygen atoms of the sulfite ligands that have Co-S bonds. Thermolysis of the complexes for M=Mn, Co, Cu, Zn in air at as low as 750 ℃ resulted in spinel oxides while the M=Ni compound resulted in a solid solution of rock salt type COO and NiO. The Fe complex did not produce a single phase oxide but a mixture of M203 (M=Fe, Co) and spinel type compound.
Page
163 - 167
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