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(C(11)H(8)NO(3))](n), is a novel carboxylate-bridged one-dimensional helical copper(II) polymer. The metal ion exhibits an approximately square-pyramidal CuBrNO(3) 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) A], resulting in the formation of a helical chain along the crystallographic b axis.