Anion-controlled assemblies from pseudo-cyclic cadmium(II) complex and spacer coligand

Self-assembly of the dipodal ligand L and CdX2 (X = ClO4 and NO3) produced unique pseudo-cyclic complexes (A) [Cd(L)(H2O)(CH3OH)](ClO4)2 (1) and [Cd(L)(H2O)(NO3)](NO3) (2), respectively. From the stepwise reaction of the pseudo-cyclic complexes (A) followed by coligands (B) such as 4,4′-bipyridine and terephthalate, the controlled one-dimensional coordination polymer {[Cd(L)(H2O)(bpy)](ClO4)2(MeOH)0.5}n (3) with (A–B)n array and the discrete “dumbbell”-like complex [Cd2(L)2(tp)(H2O)2](tp)(H2O)9 (4) with (A–B–A) patterns were isolated.