ISSN:
0306-042X
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Field desorption mass spectra of betaine hydrohalides are generally characterized by field desorption ions such as [Betaines+H]+ and cluster ions [nBetaines+H]+. In compounds where the conformation between [N]+ and COOH in the molecule is unable to form a betaine structure, the field desorption mass spectra consist only of compiex field desorption ions due to thennal decomposition products. Quaternary ammonium cations [C]+ and cluster ions [nC+(n - 1)A]+, which arise from ordinary quaternary ammonium compounds, are hardly produced. The effect of counter-ions on the field desorption mass spectra and the mechanism of field desorption ion formation are also discussed.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/bms.1200091006
