Coordination compounds of substituted 1,10-Phenanthrolines and related dipyridyls. V. Complexes of cobalt and 2,9-Dimethyl-1,10-phenanthroline
- 1 January 1965
- journal article
- research article
- Published by CSIRO Publishing in Australian Journal of Chemistry
- Vol. 18 (5) , 691-697
- https://doi.org/10.1071/ch9650691
Abstract
A series of complexes of cobalt(II) and 2,9-dimethyl-1,10-phenanthroline (dmp) has been prepared. Complexes of formula CoX2dmp (X = Cl, Br, I, KCS) are monomeric in acetone and camphor and non-electrolytes in nitrobenzene and nitromethane. The magnetic moments and visible absorption spectra favour the assignment of tetrahedral stereochemistry about the Co atom. Complexes containing 2 moles dmp per Co appear to have octahedral arrangements of ligands about the Co atom. These are of the type [CoNO3(H2O)dmp2]X, (X = NO3, ClO4, BPh4) and Co(NCS)2dmp2. The magnetic moments, visible and infrared spectra, and conductances in nitrobenzene and nitromethane support this conclusion. With other mono-dmp complexes (CoX2dmp, X = NO3, �SO4) and bis-dmp complexes {CoXdmp,ClO4,H2O (X = Cl, Br) ; Codmp2(ClO4)2}, stereochemical assignments could not be made.Keywords
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