X-ray crystallographic, spectroscopic, and electrochemical properties of [HgCl2 (κ2-N,N′-dpktch)] (κ2-N,N′-dpktch=di-2-pyridyl ketone thiophene-2-carboxylic acid hydrazone)
作者:Mohammed Bakir、Rebecca R. Conry、Orville Green
DOI:10.1016/j.molstruc.2008.12.018
日期:2009.3
When dpktch was allowed to react with HgCl2 in acetonitrile under reflux, [HgCl2(kappa(2)-N,N '-dpktch)] was isolated in good yield. Infrared spectra disclosed the absence of Hg-O coordination and H-1 NMR Studies in d(6)-dmso revealed that [HgCl2(kappa(2)-N,N'-dpktch)] is sensitive to its environment and that its amide proton is exchangeable. Electronic absorption spectral measurements confirmed the sensitivity of [HgCl2(kappa(2)-N,N'-dpktch)] to changes ill its Surroundings. In an aprotic solvent Such as CH2Cl2, a single intra-ligand-charge-transfer transition (ILCT) due to [HgCl2(kappa(2)-N,N'-dpktch)] appeared, and in a protophilic solvent, two intra-ligand-charge-transfer transitions appeared due to [HgCl2(kappa(2)-N,N'-dpktch)] and its conjugate base. Electrochemical Measurements in dmf show electrochemical decomposition following redox processes, and highlight metal and ligand based redox properties due to HgCl2, and dpktch, X-ray crystallographic Studies On a triclinic, P (1) over bar single crystal of [HgCl2(kappa(2)-N,N'-dpktch)] show the N,N'-coordination of dpktch and the extended structure revealed polymeric stacks of anti-parallel sheets of [HgCl2(kappa(2)-N,N'-dpktch)] stabilized by a web of non-covalent bonds that include pi-pi stacking, hydrogen bonds, and short non-hydrogen intermolecular interactions. (c) 2008 Elsevier B.V. All rights reserved.