Synthesis and spectroscopic characterization of cadmium(II) complexes of thiones and thiocyanate

Abstract

Cadmium(II) complexes of thiones and thiocyanate, [(4C¼S) 2 Cd(SCN) 2 ], have been prepared and characterized by IR and NMR spectroscopy. An upfield shift in the 4C¼S resonance of thiones in the 13 C NMR and downfield shift in N-H resonance in 1 H NMR are consistent with sulfur coordination to cadmium(II). The presence of (N-H) of thiones in IR spectra of the complexes indicates the thione forms of the ligands in the solid state; some contribution of the thiolate form was observed in one complex. The appearance of a band around 2100 cm À1 in IR and a resonance around 132 ppm in 13 C NMR indicates the binding of thiocyanate to cadmium(II).

Synthesis and structural characterization of cadmium(II) complexes of tetramethylthiourea (Tmtu); X-ray structure of [Cd(Tmtu)2Cl2]

“…Another peak around 470 cm -1 was also observed in all complexes that could be assigned to N-C=S bending vibration of Tmtu [32]. A sharp band at 2110 cm -1 for SCNstretch was observed in the thiocyanate complex indi cating its binding with cadmium(II) [33].…”

Dibromidobis(N,N,N′,N′-tetramethylthiourea-κS)cadmium(II)

“…For crystallographic and spectroscopic studies of thiourea complexes, see: Al-Arfaj et al (1998); Ali et al (2009); ; Lobana et al (2008); Marcos et al (1998); Moloto et al (2003). The structure of the title compound is isotypic with [Cd(tmtu) 2 I 2 ] (Nawaz et al, 2010a) and [Hg(tmtu) 2 Cl 2 ] (Nawaz et al, 2010b).…”

Synthesis and Structural Determination of a Novel Heterometallic Complex [Sb2(edta)2‐µ4‐Co(H2O)2]·5.15H2O

“…The research on design and synthesis of metal-organic coordination polymers is an area of substantial interest due to the potential of these materials in various applications as functional materials. [16][17][18][19][20] The aminopolycarboxylic acid ligands can act as a multi-dentate ligand, and its one of the most prominent characteristics bases on the bridging modes of the carboxylate group. [21][22][23][24][25] Because of the above mentioned characteristic, investigations of the syntheses and the structures of various complexes have always attracted the attention of chemists.…”