Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
Proton Magnetic Resonance Spectra of Cobalt(III) Hexammine-type Polyamine Complexes
Hayami YonedaYukiyoshi Morimoto
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1966 Volume 39 Issue 10 Pages 2180-2182


The proton magnetic resonance spectra of [Co en3]Cl3, [Co tn3]Cl3, [Co pn2]Cl3 and [Co den2]Cl3(den=diethylenetriamine) dissolved in trifluoroacetic acid were measured. All of the observed spectra consist of broad bands, which were assigned on the basis of intensity considerations and by comparing them with the spectra of the corresponding deuterated species. In case of the ethylene-diamine complex, the double-resonance method was applied, measurements at different temperatures were made, and the origin of the breadth of the bands was discussed. The NH2 signals of the ethylenediamine and trimethylenediamine complexes show AB-type features. This was confirmed by comparing the spectra obtained at 60 Mc. and at 100 Mc. The AB-type features of the NH2 signal were explained in terms of the crystal structure of the complex.

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