Substantial inverse isotope effects in the hydrogen atom abstraction from [(L)ClRhIII-H/D]+ macrocyclic complexes by methyl radicals in aqueous solutions were studied. All solutions were prepared from analytical grade chemicals and distilled water that was passed through a Millipore setup, the final resistance being above 10 Mωcm-1. The trans and cis- [(L)ClRhIII-H]+ complexes were synthesized. Gas chromatography analysis was performed on a HP 5890 gas chromatograph on a pack Q column with FID and TCD detectors. It was concluded that methyl radicals abstract an hydrogen atom and not a chlorine atom from [(L)ClRh III(H2O)}+. The results suggest that the mechanism of hydrogen abstraction from M-H groups might differ considerably from C-H groups.
|Number of pages||4|
|Journal||Chemistry - A European Journal|
|State||Published - 11 Jan 2010|
- Isotope effects
- Radical reactions
ASJC Scopus subject areas
- Organic Chemistry