Elsevier

Inorganica Chimica Acta

Volume 9, 1974, Pages 231-237
Inorganica Chimica Acta

The configuration of the cations dinitrobis(1,10-phenanthroline)cobalt(III) and dinitrobis(2,2′-bipyridyl)cobalt(III)

https://doi.org/10.1016/S0020-1693(00)89912-0Get rights and content

Abstract

A preparative study has been made of the compounds of the cations [Co(phen)2(NO2)2]+ and [Co(bipy)2(NO2)3]+ (where phen = 1,10-phenanthroline and bipy = 2,2′-bipyridyl) to check previously conflicting claims about the cofigurations of these cations. The compounds were made by a variety of routes; but, although different crystalline species of some of the the compounds now have been recognised, there is evidence for only one isomer of each cation. That this has the cis configuration is proven by the 1H n.m.r. spectra. No evidence could be obtained for trans or for nitrito isomers. The “second stage” previously observed in the acid hydrolysis of [Co(bipy)2(NO2)2]+ is shown to involve disproportionation to the tris-bipyridyl species. The 1H n.m.r. spectra in DMSO of various salts of these bis-chelated cations with different anions show differences which are interpreted as evidence for geometrically specific ion-parts.

References (14)

  • E.D. McKenzie

    Co-ordn. Chem. Rev.

    (1971)
  • A.V. Ablov

    Russ. J. Inorg. Chem.

    (1961)
  • D.G. Lambert et al.

    J. Am. Chem. Soc.

    (1966)
  • U.D. Gomwalk et al.

    J. Chem. Soc. (A)

    (1967)
  • D.M. Palade et al.

    Russ. J. Inorg. Chem.

    (1969)
  • H. Ichikawa et al.

    Bull. Chem. Soc., Japan

    (1969)
  • J.G. Gibson et al.

    J. Chem. Soc. (A)

    (1969)
There are more references available in the full text version of this article.

Cited by (1)

View full text