%0 Journal Article
%T Synthesis, Characterization and Crystal Structure of a New Schiff Base Ligand from a Bis(Thiazoline) Template and Hydrolytic Cleavage of the Imine Bond Induced by a Co(II) Cation
%A Jafar Attar Gharamaleki
%A Fahimeh Akbari
%A Akram Karbalaei
%A Kamran B. Ghiassi
%A Marilyn M. Olmstead
%J Open Journal of Inorganic Chemistry
%P 76-88
%@ 2161-7414
%D 2016
%I Scientific Research Publishing
%R 10.4236/ojic.2016.61005
%X The reaction of bis-[2-amino-4-pheny1-5-thiazolyl] disulfide with 5-nitro-salicylaldehyde in absolute ethanol resulted in the formation of a new Schiff base ligand H<sub>2</sub>L (1). Characterization of the ligand was performed by FT-IR, <sup>1</sup>H NMR, <sup>13</sup>C NMR, UV-Vis, elemental analysis and single crystal X-ray diffraction. The ligand, (1), possesses a disulfide ¨CS¨CS¨C bridge of 2.1121 (3) ? length, and the molecule adopts a <i>cis</i>-conformation around this bond. In the crystal structure of (1), an intramolecular O¨CH¡¤¡¤¡¤N hydrogen bond with D¡­ A distance of 2.69 (3) ? was present. The reaction of (1) with Co(NO<sub>3</sub>)<sub>2</sub>¡¤6H<sub>2</sub>O and CuCl<sub>2</sub>¡¤2H<sub>2</sub>O in methanol afforded the corresponding metal complexes. The obtained solids were further investigated by elemental analysis and UV-Vis titration that confirmed the formation of [CoL] and [ClCuHL] complexes. However, recrystallizaion of the Co(II) complex in dimethylsulfoxide caused the complete hydrolysis of the imine bond and afforded a Co(II) complex in which two 5-nitro-salicylaldehyde and two DMSO molecules were coordinated to the central metal in an octahedral fashion. This structure (2) was also confirmed by single crystal X-ray analysis.
%K Schiff Base
%K Thiazoline Ligand
%K Disulfide Bond
%K Co(II) and Cu(II) Complexes
%K Hydrolytic Cleavage
%K Solution Study
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=63187