Abstract
AbstractTwo families of mixed‐ligand osmium(II) complexes, namely trans,cis,cis‐[OsIICl2(azole)2(dmso)2] [azole = indazole (1), pyrazole (2), benzimidazole (3) and imidazole (4)] and cis,fac‐[OsIICl2(azole)(dmso)3] [azole = indazole (5), pyrazole (6), benzimidazole (7) and imidazole (8)] have been prepared by taking advantage of the destabilising trans effect of the S‐bonded dmso ligands. These complexes have been characterised by microanalysis, IR, UV/Vis, 1H and 13C NMR spectroscopy, electrospray mass spectrometry, cyclic voltammetry and X‐ray crystallography. They have been found to catalyse the hydration of trichloroacetonitrile to trichloroacetamide and dichloroacetonitrile to dichloroacetamide with high selectivity. The catalyst efficiency depends strongly on the nature of the complex and the azole ligand present. The highest turnover (TON of 412 for trichloroacetamide and 578 for dichloroacetamide) and product yield (82.7 % for trichloroacetamide and 75.3 % for dichloroacetamide) have been achieved with complex 7. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
