Abstract
PMR spectra were obtained from “bulk” solvent molecules in anhydrous solutions of [M(DMA) 6](ClO4)2 (M=Co, Ni) in N,N-dimethylacetamid (DMA). The free enthalpy of activation δG c * increases with increasing amount ofM 2+ as a result of the coordination of the cationsvia the oxygen atom resulting in a decrease of the\(C\underline { - - - - - } N\) bond length. Cobalt(II) acts as a weaker electron pair acceptor than nickel(II). The oxygen coordination is also shown by the different line broadening of the C-methyl protons as compared to that of the N-methyl protons.
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Gutmann, V., Kerber, W. & Beran, R. Die Koordination von Ni2+ und Co2+ in Lösung von N,N-Dimethylacetamid. Monatshefte für Chemie 104, 1109–1119 (1973). https://doi.org/10.1007/BF00903930
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DOI: https://doi.org/10.1007/BF00903930