Local structure analysis of Cu(II)-diazepam complexes by ESR spectroscopy.
CuL(2)X(2) (L = 7-chloro-1,3-dihydro-1-methyl-5-phenyl-3H-1,4-benzodiazepin-2-one, also known as diazepam, X = Cl, Br) complexes have been prepared and investigated by ESR spectroscopy. Powder ESR spectra of these complexes suggest a planar-rhombic distorted local symmetry. The CH(3)Cl solutions spectra show the presence of pseudo-tetrahedral species with a 3d(xy)+4p(z) mixture ground state for the paramagnetic electron. The anisotropic spectra obtained for the Cu(II)-diazepam solution adsorbed on NaY zeolite confirm the existence of a CuN(2)X(2) chromophore.
Cozar
O
O
Department of Physics, "Babeş-Bolyai" University, RO-3400, Cluj-Napoca, Romania.
David
L
L
Chis
V
V
Forisz
E
E
Cosma
C
C
Damian
G
G