Stevenson's rule

Stevenson's rule
IUPAC RECOMMENDATIONS 2013
Rule stating that in competing fragmentations the product ion formed from its neutral species counterpart with the lower ionization energy will usually be the more abundant. Note: The original version of this rule referred to reliability of determination of thermochemical data obtained for an ion produced by fragmentation of a single σ-bond in an odd- electron ion X-Y⁺, but was later extended to the version in more common use since then.
Related Term(s):
Reference(s): D. P. Stevenson. Disc. Faraday Soc. 10, 35 (1951). (http://dx.doi.org/10.1039/df9511000035 ) M. M. Bursey, E. S. Wolfe. Org. Mass Spectrom. 1, 543 (1968). (http://dx.doi.org/10.1002/oms.1210010408 ) A. G. Harrison, C. D. Finney, J. A. Sherk. Org. Mass Spectrom. 5, 1313 (1971). (http://dx.doi.org/10.1002/oms.1210051109 )
From Definitions of Terms Relating to Mass Spectrometry (IUPAC Recommendations 2013); DOI: 10.1351/PAC-REC-06-04-06 © IUPAC 2013.
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