On the formation of rotationally hot H2+ by dissociation of CH42+ dications

Krishnamurthi, Vidhya ; Mathur, D. ; Evans, G. T. ; Referee, Frank Harris Sponsor (1991) On the formation of rotationally hot H2+ by dissociation of CH42+ dications Rapid Communications in Mass Spectrometry, 5 (11). pp. 557-564. ISSN 0951-4198

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/rcm.129...

Related URL: http://dx.doi.org/10.1002/rcm.1290051113


Dissociation of CH42+ into CH2+ ion pairs results in formation of H2+ ions possessing a degree of rotational excitation which is high enough to enable formation of several rotational resonance states. These resonances give rise to unimolecular dissociation into H+ + H· fragments. Ion translational energy spectrometry has been applied to measure such dissociation spectra, and a number of rotational resonances are observed. Rotational resonances are not observed whenH2+ ions are generated from H2 precursors. Two models based upon ideas of impulsive energy release are investigated which attempt to correlate the centre-of-mass kinetic energy released upon dissociation of CH42+ with the observation of the rotational resonances. There is good accord between the experimental results and the prediction of our models.

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