| Abstract: Two cadmium complexes, [CdCl2(EATA)]n(1) and [CdCl2(EATA)2](2), have been synthesized by the reaction between CdCl2·2.5H2O and ethyl 2-amino-4-thiazoleacetate (EATA), and characterized by single-crystal X-ray diffraction, elemental analysis, infrared and photoluminescence spectra. Single crystal X-ray diffraction analysis reveals that, complex 1 crystallizes in monoclinic with space group P21/c, a=1.765 1(5) nm, b=0.927 7(3) nm, c=0.715 0(2) nm, β=92.072(5)°, V=1.170 0(6) nm3, Z=4, R1=0.0363, wR2=0.0762, S=1.082. The title complex 2 also belongs to the monoclinic system, space group Cc with a=1.686 0(3) nm, b=1.663 0(3) nm, c=1.622 0(3) nm, β=105.41(3)°, V=4.384 3(15) nm3, Z=8, R1=0.0215, wR2=0.0483, S=1.021. For either complexes 1 or 2, the central metal ion (Cd2+) displays a distorted six-coordinated octahedral geometry. In complex 1, two adjacent octahedral units are connected by two bridging μ2-Cl- anions, resulting in the formation of one-dimensional chain. These one-dimensional chains are further assembled into a three-dimensional network structure by intermolecular N-H…Cl hydrogen bonds interactions. In complex 2, two-dimensional supramolecular structure is generated via a large number of intermolecular N-H…Cl and C-H…Cl hydrogen bonds. Solid-state photoluminescence spectrum shows that complexes 1 and 2 have similar fluorescence behaviors, and both of which can be attributed to the ligand-to-metal charge transition (LMCT). CCDC: 837325, 1; 837326, 2. |
