𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Acetone chemical ionization studies: Olefins

✍ Scribed by M. Vairamani; K. V. Siva Kumar; G. K. Viswanadha Rao


Book ID
102557784
Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
384 KB
Volume
25
Category
Article
ISSN
1076-5174

No coin nor oath required. For personal study only.

✦ Synopsis


Acyclic, cyclic and bicyclic olefins have been found to undergo acetylation in the gas phase under acetone chemical ionization, giving rise to diagnostic ions. Terminal olefins show enhanced loss of water from the [M + 431' adduct. The [M + 431+ ion of A3-A'-and A5-oIefins give characteristic collision-induced dissociation spectra.


πŸ“œ SIMILAR VOLUMES


Acetone chemical ionization studies. Ace
✍ S. Prabhakar; P. Krishna; M. Vairamani πŸ“‚ Article πŸ“… 1997 πŸ› John Wiley and Sons 🌐 English βš– 245 KB πŸ‘ 1 views

Acetone chemical ionization mass spectra of 16 natural Ξ±-amino acids and 5 free nucleobases show characteristic ions corresponding to [M + H] + , [M + 43] + and [M + 59] + ions. The proton affinities of the substrates are found to control the formation of the above ions. The site of acetylation of a

Acetone chemical ionization studies VI:
✍ M. Vairamani; K. V. Siva Kumar πŸ“‚ Article πŸ“… 1993 πŸ› John Wiley and Sons 🌐 English βš– 308 KB

## Abstract Acetone chemical ionization mass mass spectra of four isomeric hexenyl acetates were investigated. The characteristic decomposition of [M + CH~3~CO]^+^ adducts in the field‐free region reveals site‐specific adduct formation of acetyl ion with the double bond and the acetoxy group.

Acetone chemical ionization studies III–
✍ M. Vairamani; M. Saraswathi; K. V. Siva Kumar πŸ“‚ Article πŸ“… 1992 πŸ› John Wiley and Sons 🌐 English βš– 375 KB

## Abstract Acetone chemical ionization mass spectra of acyclic, cyclic and bicyclic alkyl acetates were studied. In addition to the formation of [M + H]^+^, [M + 43]^+^ and [M + 59]^+^ ions, ions corresponding to displacement by acetone were also observed. The results suggest that the displacement

Acetone chemical ionization studies. VII
✍ M. Vairamani πŸ“‚ Article πŸ“… 1993 πŸ› John Wiley and Sons 🌐 English βš– 429 KB

## Abstract Acetone chemical ionization mass spectra of 14 monosubstituted aromatic compounds were studied. Benzene, toluene and halobenzenes give exclusively charge‐exchange spectra with very little fragmentation. Protonation is characteristic of compounds with higher proton affinities than aceton