Accession Number : AD0739716

Title :   Negative-Ion Mass Spectra of Nido Carboranes.

Descriptive Note : Technical rept.,

Corporate Author : CALIFORNIA STATE COLL LOS ANGELES DEPT OF CHEMISTRY

Personal Author(s) : Brown,Costello L. ; Gross,Kenneth P. ; Onak,Thomas

Report Date : MAR 1972

Pagination or Media Count : 24

Abstract : The negative ion mass spectra of 2,3-dicarbahexaborane(8), 2-methyl-nido-2,3-dicarbahexaborane(8) and 2,3-dimethylnido-2,3-dicarbahexaborane(8) 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)

Descriptors :   (*BORON COMPOUNDS, *MASS SPECTRA), IONIZATION, DISSOCIATION, DEUTERIUM COMPOUNDS, LABELED SUBSTANCES, ELECTRON CAPTURE

Subject Categories : Inorganic Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE