1975
DOI: 10.1002/oms.1210101106
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Ionisation and appearance potentials of alkylketones

Abstract: Abstract-The ionisation potentials of a series of alkylketones have been measured by the electronimpact technique using the second derivative method. The ionisation efficiency curves were obtained with a conventional mass spectrometer and the data treated by means of a minicomputer. These results are compared with those given by photoelectron spectroscopy, which has enabled us to test our mass spectrometric method and to distinguish between the adiabatic and the vertical ionisation potentials. It has been obse… Show more

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Cited by 21 publications
(14 citation statements)
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“…Both appear to be metastably broadened, a reasonable result given that the appearance energy of the heavier fragment is 9.90 eV (53). The intensity of the parent ion peak in the 70 eV EI spectrum of 3-pentanone is only 17% of the base peaks at m/z = 57 and 29 [C 2 H 5 + ].…”
Section: Alkanonesmentioning
confidence: 80%
“…Both appear to be metastably broadened, a reasonable result given that the appearance energy of the heavier fragment is 9.90 eV (53). The intensity of the parent ion peak in the 70 eV EI spectrum of 3-pentanone is only 17% of the base peaks at m/z = 57 and 29 [C 2 H 5 + ].…”
Section: Alkanonesmentioning
confidence: 80%
“…Figure d shows that the AE of acetone is 10.3 eV. This is significantly low compared to those of other molecules . Acetaldehyde with an acetyl group (similar to acetone) requires approximately 11.7 eV to be converted to a formyl cation (CHO + ) .…”
Section: Resultsmentioning
confidence: 96%
“…This is significantly low compared to those of other molecules. 37 Acetaldehyde with an acetyl group (similar to acetone) requires approximately 11.7 eV to be converted to a formyl cation (CHO + ). 38 The AEs of isoprene, 39 xylene, 40 and toluene 41 were 11.4, 11.9, and 13.7, respectively.…”
Section: Methodsmentioning
confidence: 99%
“…Finally, MS-and NMR-data of 7 are again identical with those reported in the literature. 9 In an additional experiment, spiro[2,3-dihydrothiin-2,2'-tricyclo[3.3.1.1 3,7 ]decan]-4-one (9) was irradiated in methanol to afford quantitatively a 4:1 mixture of methanol adducts 10 and 11, respectively (Scheme 2). Differentiation between 10 and 11 as well as their structural assignment is straightforward by 1 H-NMR.…”
Section: Resultsmentioning
confidence: 99%