CHEMICAL-IONIZATION MASS-SPECTRA OF LINEAR ALCOHOL POLYETHOXY CARBOXYLATES AND POLYETHYLENE-GLYCOL DICARBOXYLATES

Citation
Wh. Ding et al., CHEMICAL-IONIZATION MASS-SPECTRA OF LINEAR ALCOHOL POLYETHOXY CARBOXYLATES AND POLYETHYLENE-GLYCOL DICARBOXYLATES, Rapid communications in mass spectrometry, 8(12), 1994, pp. 1016-1020
Citations number
14
Categorie Soggetti
Spectroscopy,"Chemistry Analytical
ISSN journal
09514198
Volume
8
Issue
12
Year of publication
1994
Pages
1016 - 1020
Database
ISI
SICI code
0951-4198(1994)8:12<1016:CMOLAP>2.0.ZU;2-D
Abstract
The chemical ionization (CI) mass spectra of propylated linear alcohol polyethoxy carboxylates (LAEC) and polyethylene glycol dicarboxylates (PEGDC) have been determined. Olefin displacement of the alkyl chain from the [M+H](+) ions of propylated LAEC formed the protonated polyet hoxy carboxyl propyl ester, which then underwent a characteristic frag mentation by first losing water and then ethylene oxides. The fragment ation pattern for PEGDC [M + H](+) ions was similar to that of LAEC, e xcept that the initial steps were displacement of one terminal propyl formate (HCOOC3H7) followed by a neutral loss of CH2O. Strong peaks du e to protonated molecules were observed in both LAEC and PEGDC. Produc t-ion mass spectra obtained from chemical ionization gas chromatograph ic/triple-stage quadrupole mass spectrometric studies supported the pr oposed fragmentation mechanisms.