First and second ionization energies of 1,3,5-trimethylbenzene and 2,4,6-trimethylpyridine

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F09%3A00010419" target="_blank" >RIV/61989592:15310/09:00010419 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/09:10000594 RIV/61388955:_____/09:00326750 RIV/61388963:_____/09:00326750

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

First and second ionization energies of 1,3,5-trimethylbenzene and 2,4,6-trimethylpyridine

Original language description

The first and second ionization energies of trimethyl substituted analogs of benzene and pyridine are determined by means of mass spectrometry in conjunction with synchrotron radiation. The first ionization energy of 1,3,5-trimethylbenzene amounts to (8.38 +/- 0.05) eV and the second ionization energy to (22.8 +/- 0.1) eV. The first ionization energy of 2,4,6-trimethylpyridine is determined as (8.65 +/- 0.05) eV and the second ionization energy as (23.0 +/- 0.1) eV. The ionization energies are comparedwith those of unsubstituted benzene and pyridine and the effects of the methyl groups are evaluated by means of isodesmic reactions. As expected, it is found that the electron-donating effect of the methyl groups stabilizes neutral pyridine and doubly charged pyridine more than neutral benzene and doubly charged benzene, respectively. Surprisingly, the opposite effect is found for the radical cations, which is ascribed to the unfavorable degenerate electronic structure of benzene radical

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CF - Physical chemistry and theoretical chemistry

OECD FORD branch

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Project

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Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2009

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Collection of Czechoslovak Chemical Communications

ISSN

0010-0765

e-ISSN

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Volume of the periodical

74

Issue of the periodical within the volume

1

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

14

Pages from-to

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UT code for WoS article

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EID of the result in the Scopus database

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