{4-Phenyl-1-[1-(1,3-thiazol-2-yl)ethylidene]thiosemicarbazidato}{4-phenyl-1-[1-(1,3-thiazol-2-yl)ethylidene]thiosemicarbazide}nickel(II) chloride monohydrate

Abstract

In the title compound, [Ni(C12H11N4S2)(C12H12N4S2)]Cl·H2O, the NiII ion is chelated by two 2-acetyl­thia­zole-3-phenyl­thio­semicarbazone ligands, forming a distorted octa­hedral complex. The metal ion is coordinated via the thia­zole nitro­gen, imine nitro­gen and thione sulfur atoms from each thio­semicarbazone ligand, and two coordinating units lie almost perpendicular to each other give dihedral angle = 81.89 (1)°]. One thio­semicarbazone unit is found to bind a chloride anion through two hydrogen bonds, while the other is linked with the disordered crystal water molecule. Two mol­ecules are connected to each other through an inter­molecular N—H⋯S inter­action, forming a centrosymmetric dimer. Dimers are linked into sheets by π–π stacking of two phenyl rings [shortest C⋯C distance = 4.041 (3) Å].

Synthesis, characterization and biological evaluation of Pd(ii), Cu(ii), Re(i) and 99mTc(i) thiazole-based complexes

“…The IR spectrum of the free ligand shows two bands at 1640.9 and 1555.4 cm −1 that correspond to the stretching vibrations of the thiazole ring, ν(-CN) and ν(-CC). 44 A shift in the stretching frequency of these bands to a lower wavenumber was observed in the IR spectra of Re-L and Pd-L, which indicates the involvement of the thiazole nitrogen atom in the coordination, while the thiazole is not involved in the coordination in Cu-L. 45 Strong bands in the region 2024-1915 cm −1 in the IR spectrum of the complex Re-L indicate the presence of three carbonyl ligands in a facial arrangement. [46][47][48] The C-S-C band of the free ligand, which appears at 764.7 cm −1 , showed a very little effect by complexation indicating that the sulfur atom is not involved in the chelation.…”