Negative-Ion Mass Spectra of Nido Carboranes.
CALIFORNIA STATE COLL LOS ANGELES DEPT OF CHEMISTRY
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The negative ion mass spectra of 2,3-dicarbahexaborane8, 2-methyl-nido-2,3-dicarbahexaborane8 and 2,3-dimethylnido-2,3-dicarbahexaborane8 have been investigated. Evidence has been found to show that formation of negative ions in these nido carboranes predominately via resonance capture and dissociative resonance capture mechanisms. With the aid of deuterium labelling experiments, a diagnostic fragmentation giving a P-1 anion which is specific for loss of a bridge hydrogen has been found. Discrete and narrow electron energy ranges for electron capture have been determined and the electron energy dependence on ion intensities and fragmentation in the lower voltage regions have been studied. Author
- Inorganic Chemistry
- Atomic and Molecular Physics and Spectroscopy