Minimization of rearrangement reactions in mass spectra by use of collisional activation

1969 ◽  
Vol 91 (7) ◽  
pp. 1866-1868 ◽  
Author(s):  
Fred W. McLafferty ◽  
H. D. R. Schuddemage
Keyword(s):  
Collisional Activation ◽  
Mass Spectra ◽  
Rearrangement Reactions

Metastable ion decomposition and collisional activation mass spectra of 1,2,3-triarylpropen-1-ones

1991 ◽  
Vol 26 (4) ◽  
pp. 298-304
Author(s):  
K. P. Madhusudanan ◽  
S. Durani ◽  
D. M. Reddy ◽  
R. S. Kapil ◽  
Y. Itagaki ◽  
...  
Keyword(s):  
Collisional Activation ◽  
Mass Spectra ◽  
Metastable Ion Decomposition

The Collision-Induced Dissociations of Deprotonated Isopropyl and t-Butyl Ketones. Some Unusual Alkyl Migrations

1990 ◽  
Vol 43 (12) ◽  
pp. 2027 ◽  
Author(s):  
MJ Alexander ◽  
JH Bowie ◽  
RN Hayes
Keyword(s):  
Collisional Activation ◽  
Rearrangement Reactions

Rearrangement reactions involving hydride and methyl anion migrations are observed when certain enolate ions derived from isopropyl and t- butyl ketones are subjected to collisional activation. For example (i) -CH2CO-i-C3H7 → -(CH2CHO)+C3H6 and (ii) -CH2CO-t-C4H9 → -(CH2COCH3)+C3H6The mechanisms of these and related reactions have been investigated by denterium labelling and product ion studies.

Collisional activation mass spectra of ions containing polyisotopic elements

1982 ◽  
Vol 17 (2) ◽  
pp. 79-80 ◽  
Author(s):  
Peter J. Todd ◽  
Michael P. Barbalas ◽  
Fred W. McLafferty
Keyword(s):  
Collisional Activation ◽  
Mass Spectra

Collisional activation mass spectra of [C6H8]+ ions

1978 ◽  
Vol 13 (5) ◽  
pp. 254-257 ◽  
Author(s):  
Trudy E. Smith ◽  
S. Ruven Smith ◽  
Fred W. McLafferty
Keyword(s):  
Collisional Activation ◽  
Mass Spectra

Collision-Induced Dissociations of Deprotonated Peptides. Dipeptides Containing Asn, Arg and Lys

1993 ◽  
Vol 46 (5) ◽  
pp. 693 ◽  
Author(s):  
RJ Waugh ◽  
JH Bowie ◽  
ML Gross
Keyword(s):  
Collisional Activation ◽  
Mass Spectra ◽  
Fast Atom Bombardment ◽  
Side Chain ◽  
Deprotonated Peptides

The presence and position of Asn, Arg and Lys residues in dipeptides may be determined from a consideration of the collisional activation mass spectra of the (M-H)- ions formed by fast atom bombardment. All spectra show the basic dipeptide cleavage, i.e. NH2CH(R1)CONHCH(R2)CO2- → NH2C(R1)CONHCH(R2)CO2H → NH2C(R1)=C=O + -NHCH(R2)CO2H. There are a number of fragmentations characteristic of a particular α side chain: for example, Arg loses HN=C=NH (42 u).

A reinvestigation of the collisional activation mass spectra of [C7H7]+ ion mixtures

1988 ◽  
Vol 23 (7) ◽  
pp. 543-549 ◽  
Author(s):  
J. M. Buschek ◽  
J. J. Ridal ◽  
J. L. Holmes
Keyword(s):  
Collisional Activation ◽  
Mass Spectra
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