1 Zn(II) and Cu(II) formamidine complexes: Structural, kinetics and polymer tacticity studies in ring-opening polymerization of ɛ-caprolactone and lactides Ekemini D. Akpan, Stephen O. Ojwach,* Bernard Omondi,* and Vincent O. Nyamori, School of Chemistry and Physics, Westville Campus, University of KwaZulu-Natal, Private Bag X54001, Durban, 4000, South Africa. School of Chemistry and Physics, Pietermaritzburg Campus, University of KwaZulu-Natal, Private Bag X01, Scottsville, 3209, South Africa. Journal in which to be published: New Journal of Chemistry. Supplementary Information Figure S1. 1 H NMR spectrum of complex 1 in CDCl 3 at room temperature. Electronic Supplementary Material (ESI) for New Journal of Chemistry. This journal is © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2016