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Co(II), Ni(II) and Cu(II) mononuclear and polynuclear complexes influenced by the aliphatic spacer length of their O2N2O2 Schiff bases

✍ Scribed by Jesús Sanmartı́n; Manuel R Bermejo; Ana M Garcı́a-Deibe; Otaciro R Nascimento; Antonio J Costa-Filho

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
165 KB
Volume
318
Category
Article
ISSN
0020-1693

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✦ Synopsis

n have been obtained by the electrochemical reaction of Co, Ni and Cu anodes with the

The preferential attainment of mono-or polynuclear compounds seems to be conditioned by the aliphatic spacer length, among other factors.

Spectroscopic and magnetic data suggest a distorted tetrahedral array in mono-and polynuclear nickel complexes with H 4 L 2 and H 4 L 3 . However, when the aliphatic spacer is shorter, as occurs in Ni(H 2 L 1 ), physicochemical data are consistent with a square planar geometry. The EPR data for polynuclear copper complexes display the characteristics of quasi-axial symmetry and show spin-spin interactions. Magnetic and electronic data point to high-spin distorted octahedral environments for Co(II) ions in [Co 2 (L 3 )(H 2 O) 4 ] n .

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