✦ LIBER ✦

Optimized production of the acylium diagnostic ions in the chemical ionization NO+ mass spectra of long-chain monoolefins

✍ Scribed by J. Einhornt; C. Malosse

Publisher: John Wiley and Sons
Year: 1990
Tongue: English
Weight: 324 KB
Volume: 25
Category: Article
ISSN: 1076-5174
DOI: 10.1002/oms.1210250111

No coin nor oath required. For personal study only.

✦ Synopsis

A recent reinvestigation of the reactivity of NO' towards straight-chain monoolefinic compounds revealed that the characteristic acylium ions, previously reported for alkenyl acetates and related compounds, could also be obtained from alkenes and alkenoic acids (or esters). In this study, the influence of the sample pressure and that of NO on the production of the acylium ions was investigated, leading to disappearance graphs indicative of a strong dependence on these experimental factors. This gives a further explanation for previous apparent discrepancies in the literature and the optimum conditions of use for double-bond location in a variety of substituted or unsubstituted monoolefins.

📜 SIMILAR VOLUMES

Anomalous ions in the chemical ionizatio

Anomalous ions in the chemical ionization mass spectra of aromatic nitro and nitroso compounds

✍ Joseph J. Brophy; Vladimir Diakiw; Robert J. Goldsack; Derek Nelson; James S. Sh 📂 Article 📅 1979 🏛 John Wiley and Sons 🌐 English ⚖ 183 KB

## Abstract The appearance of [MH‐30]^+^ ions in the chemical ionization mass spectra of aromatic nitro compounds may be due to their initial reduction to the corresponding amines within the ion source. Aromatic nitroso compounds may be similarly reduced to yield [MH‐14]^+^ ions. The hydroxy deriva

The [M-1]− ion in the negative chemical

The [M-1]− ion in the negative chemical ionization mass spectra of diazepam and nordiazepam

✍ W. A. Garland; B. J. Miwa 📂 Article 📅 1983 🏛 John Wiley and Sons 🌐 English ⚖ 364 KB 👁 2 views

The nominal butyl ester ion in the mass

The nominal butyl ester ion in the mass spectra of long-chain n-alkyl esters: A postscript

✍ Seymour Meyerson; Eugene S. Kuhn; Imre Puskas; Ellis K. Fields; Leonard C. Leitc 📂 Article 📅 1983 🏛 John Wiley and Sons 🌐 English ⚖ 375 KB

Formation of an unusual MH− ion in the m

Formation of an unusual MH− ion in the methane negative-ion chemical ionization mass spectra of chlorprothixene and aromatic sulfur compounds

✍ Patrick S. Callery; William A. Garland; Elaine K. Fukudat 📂 Article 📅 1989 🏛 John Wiley and Sons 🌐 English ⚖ 487 KB

The methane negative-ion chemical ionization (NCI) mass spectrum of chlorprothixene shows an unusual MHion. This ion can be accounted for by electron capture followed by H transfer from the reagent gas. The most probable site of electron attachment was concluded to be related to the sulfur atom of t

Intramolecular reactions. An explanation

Intramolecular reactions. An explanation for [M−H]+ ions in the chemical ionization mass spectra of some ring C-substituted methyl dehydroabietate derivates

✍ Luís Filipe Ramalho; Ângela O. Prazeres; Bárbara Gigante; M. João Marcelo Curto; 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 66 KB

a % of the base peak. b Abundances have been corrected for isotopic contributions. c <0.5%.

Stereospecific adduct ion formation in t

Stereospecific adduct ion formation in the chemical ionization mass spectra of E- and Z-1,2,3-triaryl-2-propen-1-ones

✍ K. P. Madhusudanan; Shubhra Mittal; Susheel Durani; R. S. Kapil 📂 Article 📅 1985 🏛 John Wiley and Sons 🌐 English ⚖ 382 KB