Synthesis and crystal structure of cadmium(II) complex with 2-pyrimidinecarboxamide

The complex [Cd(N2H3C5ONH2)2(CH3COO)2] (I) was synthesized and its structure was determined. The crystals are monoclinic: space group C2/c, a = 14/416(1), b = 9.410(1), c = 13.708(1) Å, β = 113.82(1)°, V = 1701.0(1) Å3, ρ(calcd.) = 1.862 g/cm3, Z = 4. The structure consists of individual complexes I united by the N-H…O hydrogen bonding system into supramolecular framework. The coordination sphere of the cadmium atom (on axis 2) involves two chelate pyrimidinecarboxamide ligands, which form five-membered chelate rings CdOCCN(Cd-N(2) 2.432(4), Cd-O(3) 2.388(4) Å), and two monodentate CH3COO− ions (Cd-O(1) 2.280(3) Å). The second O atom of the acetate group is involved in a weak contact with the Cd2+ ion (Cd-O 2.670(4) Å). With account for the latter two contacts, the coordination polyhedron of Cd is irregular octahedron.