Maigari A. U.

Department of Chemistry, Federal College of Education ( Tech.), P. M. B. 60, Gombe, Gombe State, Nigeria

Ekanem E. O.

Department of Chemistry, Abubakar Tafawa Balewa University, Bauchi State, Nigeria

Garba I. H.

Department of Chemistry, Abubakar Tafawa Balewa University, Bauchi State, Nigeria

Harami A.

Department of Chemistry, Abubakar Tafawa Balewa University, Bauchi State, Nigeria

Akan J. C.

Department of Chemistry, University of Maiduguri, Maiduguri, Borno State, Nigeria