Complexes of Mn(II) with 1,8-naphthyride containing amide group ligands 2-amino1-8,naphthyride-3-carboxamide (ANC), 2-amino-N-phenyl-1,8-naphthyride-3-carboxamide (APNC), 2-amino-N-(p-methyl phenyl)-1,8-naphthyridine-3-carboxamide(AMPNC), 2-amino-N-)p-bromo phenyl)1,8-naphthyridine-3-carboxamide(ABPNC), 2-amino-N-(p-chloro phenyl)-1,8-naphthyridine3-carboxamide (ACPNC), 2-amino-N-(p-methoxy phe...