ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

Hits per page

hit 1 - 1 | 1 hit

Sorting

Electronic Resource

Cyclization of molecular ions: The mass spectrometric fragmentation of allene-carboxylic esters (1972)

Liehr, J. G. ; Runge, W. ; Richter, W. J.

Chichester : Wiley-Blackwell

Biological Mass Spectrometry 6 (1972), S. 853-862

add to mindlist on the mindlist

Details

ISSN: 0030-493X

Keywords: Chemistry ; Analytical Chemistry and Spectroscopy

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: A series of six 2,4,4-substituted allenecarboxylic esters R1R2C=C=C(R3)COOAlk has been found to exhibit O-Alkyl cleavage as the most prominent feature of both their 70 and 12 eV mass spectra. Loss of linearity of the allene system upon ionization, followed by conversion of the molecular ion to a 5-membered cyclic isomer, is thought to induce this unusual mode of bond rupture. Oxygen-migration from the ester function to C-4 as is indicated by the subsequent decomposition of the [M - Alk] ions to [R1—C≡O]+ and [R2—C≡O]+ fragments can be taken as direct evidence in favour of this rationale.

Additional Material: 6 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/oms.1210060805

Permalink

	Location	Call Number	Expected	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

hit 1 - 1 | 1 hit