Citation: Yanjuan Qi; Yonghui Wang; Changwen Hu; Minhua Cao; Li Mao; Enbo Wang (2003). A New Type of Single-Helix Coordination Polymer with Mixed Ligands [M2(phen)2(e,a-cis-1,4-chdc)2(H2O)2]n (M = Co and Ni; phen = 1,10-phenanthroline; chdc = cyclohexanedicarboxylate). Inorganic Chemistry, 42, pp. 8519-8523.