Syntheses and characterization of two 1D Cu(II) coordination polymers with 2,2′:6′,2″-terpyridine ligand

Abstract

The solution reactions of CuCl2 with 2,2′:6′,2″-terpyridine (Terpy) and dicarboxylic acid (glutaric acid or suberic acid) afforded two 1D coordination polymers [Cu(Terpy)(C5H6O4)]n (I) and [Cu(Terpy)(C8H12O4)] · 3H2O (II) and their structures were characterized by IR, TG-DTA, and single-crystal X-ray diffraction. Crystallographic data for I: C20H16CuN3O4, Mr = 425.90, monoclinic, space group C2/c, a = 10.335(2), b = 21.193(4), c = 8.580(2) A, β = 111.99(3)°, V = 1742.5(6) A3, Z = 4, ρc = 1.623 g/cm3, F(000) = 872, R = 0.0304 and wR = 0.0915; and those for II: C23H29CuN3O7, Mr = 523.03, triclinic, space group P\(\bar 1\), a = 8.362(2), b = 10.605(2), c = 14.617(3) A, α = 73.26(3)°, β = 86.23(3)°, γ = 69.45(3)°, V = 1161.3(4) A3, Z = 2, ρc = 1.496 g/cm3, F(000) = 546, R = 0.0636 and wR = 0.1106. X-ray diffracion studies reveal that both complexes I and II feature 1D chain. The 1D polymer chains are connected by π-π-stacking interactions to generate 2D supramolecular layers.