Contributions to the Interpretation of Mass Spectra of the TEOS Methoxy-Transesters. Linked Scans, Accurate Mass Measurements and M+1, M+2 Isotopic Effects

Badescu, Virgil

Virgil Badescu

Contributions to the Interpretation of Mass Spectra of the TEOS Methoxy-Transesters. Linked Scans, Accurate Mass Measurements and M+1, M+2 Isotopic Effects

Abstract:

The aim of this article is the study of the fragmentation reactions of the methoxy-transesters of tetraethoxysilane (TEOS), with structural formula (CH3O)x(C2H5O)ySi, initiated by electronic impact in the ionization chamber of a double focusing mass spectrometer. The initiation centers of fragmentation reactions for the neutral and ionized TEOS methoxy-transesters were established by quantum calculations of net atomic charges. The ions of the mass spectra of the TEOS methoxy-transesters were obtained experimentally by the B/E and B/E(1-E)1/2 linked scans. Thus, there can be written the fragmentation pathways for the primary events by B/E linked scan (cleavage of methoxy and ethoxy groups) and eliminations of neutral molecules (acetaldehyde, ethylene, formaldehyde, molecular hydrogen) by B/E(1-E)1/2 linked scan. Accurate mass measurements at high resolution (5000), double bond equivalent (DBE) for the molecular ions and fragmentation ions of the TEOS methoxy-transesters and M+1, M+2 isotopic effects were used to confirm their identification. The reaction pathways and accurate mass in mass spectrum of dimethoxydiethoxysilane (TR2M) are detailed.

Keywords:
TEOS methoxy-transesters; mass spectra; linked scans; accurate masses; isotopic effects

Issue: 2020, Volume 71, Issue 8

Pages: 39-54

Publication date: 2020/8/31

https://doi.org/10.37358/RC.20.8.8277

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This article is published under the Creative Commons Attribution 4.0 International License

Citation Styles

Cite this article as:
BADESCU, V., Contributions to the Interpretation of Mass Spectra of the TEOS Methoxy-Transesters. Linked Scans, Accurate Mass Measurements and M+1, M+2 Isotopic Effects, Rev. Chim., 71(8), 2020, 39-54.

Vancouver
Badescu V. Contributions to the Interpretation of Mass Spectra of the TEOS Methoxy-Transesters. Linked Scans, Accurate Mass Measurements and M+1, M+2 Isotopic Effects. Rev. Chim.[internet]. 2020 Aug;71(8):39-54. Available from: https://doi.org/10.37358/RC.20.8.8277

APA 6th edition
Badescu, V., (2020). Contributions to the Interpretation of Mass Spectra of the TEOS Methoxy-Transesters. Linked Scans, Accurate Mass Measurements and M+1, M+2 Isotopic Effects. Revista de Chimie, 71(8), 39-54. https://doi.org/10.37358/RC.20.8.8277

Harvard
Badescu, V., (2020). 'Contributions to the Interpretation of Mass Spectra of the TEOS Methoxy-Transesters. Linked Scans, Accurate Mass Measurements and M+1, M+2 Isotopic Effects', Revista de Chimie, 71(8), pp. 39-54. https://doi.org/10.37358/RC.20.8.8277

IEEE
V. Badescu, "Contributions to the Interpretation of Mass Spectra of the TEOS Methoxy-Transesters. Linked Scans, Accurate Mass Measurements and M+1, M+2 Isotopic Effects". Revista de Chimie, vol. 71, no. 8, pp. 39-54, 2020. [online]. https://doi.org/10.37358/RC.20.8.8277

Text
Virgil Badescu,
Contributions to the Interpretation of Mass Spectra of the TEOS Methoxy-Transesters. Linked Scans, Accurate Mass Measurements and M+1, M+2 Isotopic Effects,
Revista de Chimie,
Volume 71, Issue 8,
2020,
Pages 39-54,
ISSN 2668-8212,
https://doi.org/10.37358/RC.20.8.8277.
(https://revistadechimie.ro/Articles.asp?ID=8277)
Keywords: TEOS methoxy-transesters; mass spectra; linked scans; accurate masses; isotopic effects

RIS
TY - JOUR
T1 - Contributions to the Interpretation of Mass Spectra of the TEOS Methoxy-Transesters. Linked Scans, Accurate Mass Measurements and M+1, M+2 Isotopic Effects
A1 - Badescu, Virgil
JF - Revista de Chimie
JO - Rev. Chim.
PB - Revista de Chimie SRL
SN - 2668-8212
Y1 - 2020
VL - 71
IS - 8
SP - 39
EP - 54
UR - https://doi.org/10.37358/RC.20.8.8277
KW - TEOS methoxy-transesters
KW - mass spectra
KW - linked scans
KW - accurate masses
KW - isotopic effects
ER -

BibTex
@article{RevCh2020P39,
author = {Badescu Virgil},
title = {Contributions to the Interpretation of Mass Spectra of the TEOS Methoxy-Transesters. Linked Scans, Accurate Mass Measurements and M+1, M+2 Isotopic Effects},
journal = {Revista de Chimie},
volume = {71},
number = {8},
pages = {39-54},
year = {2020},
issn = {2668-8212},
doi = {https://doi.org/10.37358/RC.20.8.8277},
url = {https://revistadechimie.ro/Articles.asp?ID=8277}
}

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