A new pendant-arm macrocyclic ligand, N,N'-bis(2-cyanoethyl)-3,4:9, 10-dibenzol, 12-diaza-5, 8-dioxacyclopentadecane (L), was synthesized in 93% yield by alkylating 3,4:9,10-dibenzo-1,12-diaza-5,8-dioxacyclopentadecane with acrylonitrile. Its crystal structure was determined and its copper(II) complex was also prepared. All compounds were characterized by IR, NMR, elemental analyses and UV-Vis. The complex has the formula of CuLCl2 . 2H(2)O.