Binuclear Metal Complexes. IL. Synthesis, ESR, and Electrochemical Properties of Strati-bis Copper(II)–Nickel(II) Complexes
- 1 January 1983
- journal article
- research article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 56 (1) , 149-152
- https://doi.org/10.1246/bcsj.56.149
Abstract
Strati-bis copper(II)–nickel(II) complexes, CuNi(R-sata) and CuNi(R-sacta) (R=H, 5-Me, 5-Br), have been prepared, where H4(R-sata) and H4(R-sacta) denote 1,2,3,4-tetrakis(R-salicylideneamino)-2,3-dimethylbutane and 1,2-bis(R-salicylideneamino)-1,2-bis(R-salicylideneaminomethyl)cyclohexane, respectively. ESR spectra of the complexes (frozen chloroform solution at liquid nitrogen temperature) showed a tetragonal pattern with a hyperfine coupling constant A⁄⁄ smaller than that of the relevant mononuclear copper(II) complex. Based on cyclic voltammetry and differential pulse polarography, it was shown that the Cu(II)→Cu(I) reduction occurs at a higher potential than that of the mononuclear reference complex. The ESR and electrochemical properties have been interpreted in terms of the stacking of the CuN2O2 and NiN2O2 planes and hence the electron delocalization over the whole molecule through the ligand π-system.Keywords
This publication has 10 references indexed in Scilit:
- Binuclear Metal Complexes. XLV. Synthesis and Magnetic, Spectral, and Electrochemical Studies of Strati-bis Copper(II) Complexes of Some Schiff Bases Derived from Primary Tetraamines and SalicylaldehydesBulletin of the Chemical Society of Japan, 1982
- Crystal and molecular structure of cofacial dicopper hexyldiporphyrin-7Journal of the American Chemical Society, 1980
- Transferability of ligand field parameters and nonlinear ligation in chromium(III) complexesInorganic Chemistry, 1980
- Electrode catalysis of the four-electron reduction of oxygen to water by dicobalt face-to-face porphyrinsJournal of the American Chemical Society, 1980
- Synthetic models for bis-metallo active sites. A porphyrin capped by a tetrakis(pyridine) ligand systemJournal of the American Chemical Society, 1978
- strati-Bisporphyrins. A novel cyclophane systemJournal of the American Chemical Society, 1977
- Transition metal complexes with binucleating ligandsCoordination Chemistry Reviews, 1977
- Synthesis and characterization of "face-to-face" porphyrins.Proceedings of the National Academy of Sciences, 1977
- Studies on Ni(II) Complexes. I. Spectra of Tricyclic Schiff Base Complexes of Ni(II) and Cu(II)Journal of the American Chemical Society, 1960
- The colours and magnetic properties of hydrated iron group salts, and evidence for covalent bondingProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1955