International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2572

Full Length Research Paper

Complexation of cobalt (II) with nicotinohydroxamic acid and its microbial sensitivity

Aliyu A. O.* and Nwabueze J. N.
1Department of Chemistry, Nigerian Defence Academy, P. M. B. 2109, Kaduna, Nigeria. 2Department of Chemistry, University of Abuja, P. M. B 117, FCT, Abuja, Nigeria.
Email: [email protected]

  •  Accepted: 16 July 2008
  •  Published: 31 July 2008


Complex of cobalt (II) with nicotinohydroxamic acid (NHA) has been investigated by spectroscopic method at 25 ± 0.1oC in aqueous solution of 0.1mol dm-3 ionic strength. The results reveal the sole formation of 1:2 complex at equilibrium. Spectra and magnetic studies of the isolated complex indicate octahedral mixed coordination mode (N.O). Microbial sensitivity test on eight micro-organism (that is, four gram +ve and four gram - ve bacterial strains) showed activity.


Key words: Complex, hydroxamic acid, spectroscopic investigations, microbial activity, cobalt (II).