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Collision-activated dissociation mass spectra of crown ethers, perfluorinated crown ethers and related macrocycles

✍ Scribed by Simin Maleknia; Chien-Chung Liou; Jennifer Brodbelt

Publisher: John Wiley and Sons
Year: 1991
Tongue: English
Weight: 503 KB
Volume: 26
Category: Article
ISSN: 1076-5174
DOI: 10.1002/oms.1210261117

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✦ Synopsis

The collision-activated dissociation (CAD) mass spectra for a series of crown ethers, perfluor0 crown ethers, cryptands and several dicyclohexano substituted crown ethers are reported. The CAD spectra were acquired with a triple quadrupole mass spectrometer, and in some cases spectra were recorded as a function of collision energy. In general, the protonated crown ethers dissociate via a series of losses of C,H,O units, The perfluor0 crown ethers dissociate predominantly via losses of CzF,O units. The dicyclohexano ethers fragment in analogous ways in conjunction with cleavage of the cyclohexano rings. CAD spectra are also reported for acyclic ether systems.

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Collision-induced dissociation mass spec

Collision-induced dissociation mass spectra of positive ions derived from tetrahydropyranyl (THP) ethers of primary alcohols

✍ Josef Ruzicka; Carl Weisbecker; Athula B. Attygalle 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 560 KB

## Abstract Peaks for [M + H]^+^ are not observed when electrospray ionization mass spectra of tetrahydropyranyl (THP) ethers are recorded under acidic conditions. However, gaseous [M + H]^+^ ions can be generated from ammonium adducts of THP ethers of primary alcohols by in‐source fragmentation. T