Solvothermal Synthesis and Structure Characterization of a 3D Hydrogen-bonded Copper Compound [Cu(H_2dhpmc)_2]·2H_2O

1 INTRODUCTION The controlled assembly of inorganic and coordination polymers from simple building blocks is an important challenge in the design of high- dimensionality systems. In the crystal engineering 'toolbox'1], hydrogen bonding moieties are perhaps the implements used the most in the design of such supramolecular systems2], and have been particularly strongly applied towards the synthesis of molecular magnetic materials3~6]. Copper complexes play an important role in catalyzin…

Solvothermal Synthesis and Structure Characterization of a 3D Hydrogen-bonded Copper Compound [Cu(H2dhpmc)2]·2H2O

The solvothermal reaction of H3dhpmc (H3dhpmc = 2, 4-dihydroxypyrimidine- 5-carboxylic acid), CuCl2·H2O and NaVO3 results in the formation of a discrete mononuclear Cu(Ⅱ) complex Cu(H2dhpmc)2]·2H2O. It crystallizes in monoclinic system, space group P21/c with a = 5.0497(9), b = 10.0196(6), c = 13.715(2) (A。）, β = 96.237(1)°, V = 689.8(2) (A。）3, Z = 2, Dc = 1.973 g/cm3, μ = 1.654 mm-1, F(000) = 414, R = 0.0736 and wR = 0.1351. Each Cu(Ⅱ) is coordinated to four oxygen atoms of two 2, 4-dihydroxypyrimidine-5-carboxylic acid ligands in the equatorial position and two oxygen atoms of two water molecules in the axial position to form an axially elongated octahedral geometry. The title complex is further linked into a three-dimensional structure through the weak interactions of hydrogen bonds between the oxygen atoms and the nitrogen atoms.