Coordination Polymers Formed by the Mono- and Dinuclear Cu(II) Complexes of 1,1′-Methylene/thio-bis(2-naphthoxy) Acetic Acid

A series of five new Cu2+ coordination polymers, namely, {[CuLCH2(DMF)](DMF)}n (1), {[CuLCH2(DMF)(2,2′-bipy)](CH3OH)}n (2), {[CuLCH2(2,2′-bipy)](2H2O)}n (3), {[CuLCH2(H2O)(2,2′-bipy)](2H2O)}n (5), {[Cu2(LS)2(DMF)2](DMF)(CH3OH)(2H2O)}n (6), and three discrete coordination complexes {[Cu2LCH2(2,2′-bipy)2(CH3O)](ClO4)(CH3OH)} (4), {[CuLS(2,2′bipy)](CH3OH)} (7), and {[CuLS(1,10-phen)](DMF)} (8) have been prepared by the reaction of Cu(ClO4)2·6H2O and 1,1′-methylene-bis(2-naphthoxy acetic acid) (LCH2) or 1,1′-thio-bis(2-naphthoxy acetic acid) (LS), with or without the presence of 2,2′-bipyridine, under varying reaction conditions or methods of crystallization or both. All the compounds were characterized by elemental analysis, IR, thermogravimetric analysis, and single crystal X-ray diffraction (XRD). The structures of LCH2 and LS obtained by single crystal XRD indicated anti- orientation of the pendant arms which upon metal complexation may turn into cis- orientation leading to discrete metal ion complexes or...