Electrochemical Studies on Metal–Metal Interactions in Bismacrocyclic Ni(II) Complexes
- 1 March 1988
- journal article
- research article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 61 (3) , 1023-1025
- https://doi.org/10.1246/bcsj.61.1023
Abstract
Studies on five Ni(II) complexes, i.e., 7,7′-polymethylenebis[2,12-dimethyl-3,7,11,17-tetraazabicyclo[11.3.1]heptadeca-1(17),2,11,13,15-pentaene]dinickel(II) per-chlorates with polymethylene bridges of 2–6-C length, by cyclic voltammetry and differential pulse polarography, have revealed that the half-wave potentials of the [NiIINiII]/[NiIINiIII] and [NiIINiIII]/[NiIIINiIII] couples are not changed among the hexa- to tetramethylene derivatives but shifted toward the positive side in the following order: tetramethylene<trimethylene<ethylene derivative. These results are explainable in terms of the electrostatic repulsion due to these two metal ions.Keywords
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