Syntheses, Crystal Structures and Thermal Properties of Two Dicadmiun(II) Complexes Cd2L2X2 (HL = N-(3-Methoxylsalicylidene)-3-dimethylaminopropylamine, X = Cl (1), NCS (2))

Two Cd(II) complexes, Cd2L2Cl2 (1) and Cd2L2(NCS)(2) (2) (HL = N-(3-methoxylsalicylidene)-3-dimethylaminopropylamine) were synthesized and determined by EA, IR, TG and single-crystal X-ray diffraction. The crystallographic data are as follows: monoclinic, space group P2(1)/n, a = 9.2710(9), b = 18.0069(18), c = 18.5562(19) angstrom, beta = 99.741(4)degrees, V = 3053.1(5), Z = 4, mu = 1.605, F(000) = 1536, R = 0.0264 and wR = 0.0699 for 1; orthorhombic, space group Pca2(1), a = 16.196(3), b = 11.506(2), c = 36.126(7) angstrom, V = 6732(2), Z = 8, mu = 1.428, F(000) = 3264, R = 0.0376 and wR = 0.0877 for 2. There are two geometrically different octahedral Cd(H) atoms, with N4O2 and O4Cl2 donor sets for 1 while N4O2 and N2O4 for 2. In the dinuclear Cd(II) centers, the Cd(II) atoms are held together by two deprotonted phenolate oxygen atoms from tetradentate L- ligands. The thermal gravity data show two step decompositions with the residues of CdO for two complexes.