EXAFS measurements were performed on the K-edge for CuL2 (I; HL = o-hydroxybenzylamine), [CuL2(H2O)].0.5H2O (II) and CuL12.H2O (III; HL1 = N-o-hydroxybenzylglycine, n = 1) on a x-ray spectrometer in transmission mode. The crystal structures of I and II are known and used as the model and ref. compound, resp. Parameterized amplitude and phase shift were curve fitted from the Fourier filtering data of I and transferred to deduce the structural parameters of I for certification. By curve fitting the EXAFS of III with the certified amplitude and phase shift function, the coordination structural information of bond lengths, coordination nos. and the type of coordination atoms were obtained. Combined with IR spectroscopy and ionic conductivity studies, the conclusion can be inferred that Cu(II) in III is linked with 2 benzyl N atoms, 2 carboxylate O atoms and has square coordination, planar wherein the Cu-O (carboxylate O) bond length is 2.00 ? and Cu-N 1.99 ? There is another O atom located 2.95 ?away from the central Cu. The phenol O atom in III is not coordinated with Cu(II), therefore, here N-o-hydroxylbenzylglycine behaves as a bidentate ligand.

Key words: PHENOL P, CRYSTAL STRUCTURE DETERMINATION, PHENYLETHYLAMINE P, X-RAY DIFFRACTION ANALYSIS, CURVE FITTING, COPPER COMPLEX, HYDRATE, FOURIER TRANSFORM, LIGAND FIELD THEORY, GLYCINE P