A one-dimensional carboxylate-bridged helical copper(II) complex containing (quinolin-8-yloxy)acetate

The title compound, catena-poly[[bromocopper(II)]-mu-(quinolin-8-yloxy)acetato-kappa(4) N,O,O':O"], [CuBr(C11H8NO3)](n), is a novel carboxylate-bridged one-dimensional helical copper(II) polymer. The metal ion exhibits an approximately square-pyramidal CuBrNO3 coordination environment, with the three donor atoms of the ligand and the bromide ion occupying the basal positions, and an O atom belonging to the carboxylate group of an adjacent molecule in the apical site. Carboxylate groups are mutually cis oriented, and each anti-anti carboxylate group bridges two copper(II) ions via one apical and one basal position [Cu...Cu = 5.677 (1) Angstrom], resulting in the formation of a helical chain along the crystallographic b axis.