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Title: Cu K-absorption near edge studies on diethylenetriamine mixed ligand copper (II) complexes in solid state and in aqueous solution
Authors: Joshi, S K
Sharma, P K
Shrivastava, B D
Mishra, A
Pandeya, K B
Issue Date: Sep-2006
Publisher: NISCAIR-CSIR, India
IPC Code: Int. Cl.8 C07F1/08: G01N23/00
Abstract: The Cu K-absorption near edge structure studies of some coppcr(II) mixed ligand complexes are reported here, involving the primary ligand diethylenetriamine (DETA) and the secondary ligands imidazole(Im), methylimidazole (MIm) and ethyl imidazole (Elm). The studies have been made both in the solid as well as in the aqueous solution forms. The chemical shifts obtained for Cu K-absorption edge suggest that the entry of the secondary ligands into the co ordination sphere affects the chemical shifts only slightly. The chemical shifts values are larger in the solid state as compared to the corresponding values in the aqueous solution form indicating more ionic nature of the complexes in the solid state. Further in the solid state, there is no splitting of the K-absorption edge, where as in the aqueous solution form the K-edge splits into K1 and K2 edges showing that the octahedral geometry in the solid form gets distorted in the solution form. The relative order of ionicity of the complexes in solid form is altered in solution form, which can be explained in terms of the changes in the geometry of the complexes on dissolution in water.
Page(s): 1994-1998
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections: IJC-A Vol.45A(09) [September 2006]

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