Structures of copper(II) complexes with dihydrobenzoxazine derivatives in chloroform

Structures of copper(II) complexes with dihydrobenzoxazine derivatives in chloroform Copper(II) complexes CuL2 (HL = 2-(2-hydroxyphenyl)-4,4-diphenyl-1,2-dihydro-4H-3,1-benzoxazine and 2-(2-hydroxy-5-nitrophenyl)-4,4-diphenyl-1,2-dihydro-4H-3,1-benzoxazine) in chloroform were studied by EPR and electronic absorption spectroscopy. It was found that the complexation involves the azomethine forms of the ligands, which are coordinated by the Cu atom through the phenol and azomethine fragments of both ligands. The electronic absorption spectra were decomposed into Gaussian components to determine the d-d transition energies. The parameters of the complexation were calculated in terms of the angular overlap model. The order of energy arrangement of the orbitals of the central atom was determined: $$d_{x^2 - y^2 } \gg d_{xy} > d_{z^2 } > d_{xz} > d_{yz} $$ . Russian Journal of Coordination Chemistry Springer Journals

Structures of copper(II) complexes with dihydrobenzoxazine derivatives in chloroform

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Copyright © 2006 by Pleiades Publishing, Inc.
Chemistry; Inorganic Chemistry; Physical Chemistry
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