Acetonitrile may be used as a chemical ionization reagent gas in ion-trap mass spectrometry for the location of double bonds in functionalized long-chain monoenes. [C 3 H 4 N] , derived from acetonitrile, reacts with carbon-carbon double bonds, generating one or a pair of fragment ions characteristi
Ionized vinylamine: a specific reagent for the determination of olefinic bond position by ion/molecule reactions
✍ Scribed by Guy Bouchoux; Jean-Yves Salpin
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 183 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0951-4198
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✦ Synopsis
The use of ionized vinylamine [CH 2 = CHNH 2 ] + . in locating double bonds in olefinic compounds is illustrated on a series of octene molecules. It is demonstrated that a cyclobutanation process leads to intense diagnostic ions which unambiguously allow the position of the C = C bond on the aliphatic chain to be determined. The described experiments were carried out in a Fourier transform ion cyclotron resonance mass spectrometer. Under these conditions high reaction efficiencies and pronounced regioselectivity are observed.
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A new derivatization reaction was developed for the charactertization of organic acids by electrospray ionization mass spectrometry in the highly sensitive positive-ion mode, using N,N'-dicyclohexylcarbodiimide and N,N'-dimethylethylenediamine. Suitability of the reaction was demonstrated on differe