Synthesis and Crystal Structure of Cd3(dppz)2(cis-chdc)2(trans-chdc)[dppz = dipyrido[3,2-a:2′,3′-c]phenazine and chdc = 1,4-cyclohexanedicarboxylate]

The coordination polymer Cd3(dppz)2(cis-chdc)2(trans-chdc) (dppz = dipyrido[3,2-a:2′,3′-c]phenazine and chdc = 1,4-cyclohexanedicarboxylate) (1), with the formula C60H50Cd3N8O12 was synthesized and the crystal structure was determined by single-crystal X-ray diffraction. The complex belongs to a triclinic system, space group P1 with a = 8.6338(17)A, b = 10.774(2)A, c = 14.872(3)A, α = 77.23(3)°, β = 81.77(3)°, γ = 82.80(3)°. The chdc2- carboxylates bridge the Cd(II) cations to form rare trinuclear Cd(II) clusters. The cis-chdc2- ligands are held together by the trinuclear Cd(II) clusters to generate a double-stranded chain. Further, the trans-chdc2- ligands bridge adjacent double-stranded chains to yield an interesting two-dimensional framework.