Definition: What is McLafferty Rearrangement? Mass spectrometry is a technique used to determine the mass of a given molecule. The molecule is placed inside the spectrometer and ionized by high-energy electrons. After the molecules are ionized, they become radical cations that can then be sorted ...
As a rule, the McLafferty process occurs in these compounds even when the Norrish Type II process does not; the simple analogy of production of similar reactivities by the removal of an electron (in the McLafferty rearrangement) and the promotion of an electron to a non-interacting orbital ...
Strong molecular ion signals are found in these spectra. The principal fragmentation pathway is loss of an alkene (Cn-1 Hn-2 or Cm-1 H2m-2) via a process analogous to the McLafferty rearrangement. In suitable cases (n, m >= 3), a second alkene [Cm-1H2m-2] is expelled from the ...
A McLafferty rearrangement in an even??electron system: C3H6 elimination from the α??cleavage product of tri??n??butylamine H Budzikiewicz, P Bold Index:Budzikiewicz, Herbert; Bold, Peter Organic Mass Spectrometry, 1991 , vol. 26, # 8 p. 709 - 712...
Mass Spectra of New Functionally Substituted Heterocycles: V. First Example of McLafferty Rearrangement in the Series of 5-(1-Ethoxyethoxy)-2,3-dihydropyridines and 3-(1-Ethoxyethoxy)pyridines Derived from α-Lithiated 1-(1-Ethoxyethoxy)allene and Methoxymethyl Isothiocyanate Journal Russian Journal...
Oxygen equivalence in the fragment ion generated in the McLafferty rearrangement of aromatic estersdoi:10.1002/oms.1210021114Robert H. ShapiroDepartment of Chemistry, University of Colorado, Boulder, Colorado 80302, USAKenneth B. TomerDepartment of Chemistry, University of Colorado, Boulder, Colorado ...
• SUPPORTING INFORMATION • · SPECIAL TOPIC · Mass Spectrometry Analysis SCIENCE CHINA Chemistry doi: 10.1007/s11426-014-5085-z The effect of cation size (H+, Li+, Na+, and K+) on McLafferty-type rearrangement of even-electron ions in mass spectrometry CHAI YunFeng & PAN YuanJia...
The McLafferty rearrangement giving rise to the McLafferty ion, the complementary ion and a protonated molecule is discussed in the cases of the alkenes, alkanals, alkanones, alkanoic acids and alkanoic esters, in terms of the low-energy, low-temperature mass spectra. Based on the behaviour ...
Competitive McLafferty-type rearrangements of sodium adduct of anti-2,3-dihydroxy-1-phenylpentane-1,4-dione compounds in tandem mass spectrometryMcLafferty-type rearrangementsodium adductsix-membered ring coordinationenergy-resolved collision-induced dissociation...
Chai YF, Pan YJ (2014) The Effect of Cation Size (H + , Li + , Na + , and K + ) on McLafferty -Type Rearrangement of Even-Electron Ions in Mass Spectrometry. Science China, Chemistry 57:662The effect of cation size (H + , Li + , Na + , and K + ) on McLafferty-type ...