1. Computational and Bio-Simulation Research Group, University of Calabar, Calabar540221, Nigeria
2. Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar540221, Nigeria
3. Department of Mathematics, Faculty of Physical Sciences, University of Calabar, Calabar540221, Nigeria
4. School of Chemistry, University of St Andrews, St AndrewsKY16 9ST, United Kingdom
5. Department of Chemical Sciences, University of Johannesburg, Auckland Park2006South Africa
6. Department of Chemistry, Covenant University, Ota50001, Nigeria