Chemical Sciences: A Manual for CSIR-UGC National Eligibility Test for Lectureship and JRF/McLafferty rearrangement

From Wikibooks, open books for an open world
Jump to: navigation, search

The McLafferty rearrangement is a reaction observed in mass spectrometry. It is sometimes found that a molecule containing a keto-group undergoes β-cleavage, with the gain of the γ-hydrogen atom. This rearrangement may take place by a radical or ionic mechanism.

The reaction[edit]

A description of the reaction was first published by the American chemist Fred McLafferty in 1959.[1][2][3]

An example of the McLafferty rearrangement

References[edit]

  1. F. W. McLafferty (1959). "Mass Spectrometric Analysis. Molecular Rearrangements". Anal. Chem. 31 (1): 82–87. doi:10.1021/ac60145a015. 
  2. Gross ML (2004). "Focus in honor of Fred McLafferty, 2003 Distinguished Contribution awardee, for the discovery of the "McLafferty Rearrangement"". J. Am. Soc. Mass Spectrom. 15 (7): 951–5. doi:10.1016/j.jasms.2004.05.009. PMID 15234352. 
  3. Nibbering NM (2004). "The McLafferty rearrangement: a personal recollection". J. Am. Soc. Mass Spectrom. 15 (7): 956–8. doi:10.1016/j.jasms.2004.04.025. PMID 15234353. 

Further reading[edit]