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Laser Powered Homogeneous Decomposition of Selenophene and Tellurophene
- 1.0028362 - UCHP-M 20050053 RIV NL eng J - Journal Article
Urbanová, Markéta - Pokorná, Dana - Ouchi, A. - Pola, Josef
Laser Powered Homogeneous Decomposition of Selenophene and Tellurophene.
[Laserově iniciovaný homogenní rozklad selenofénu a tellurofénu.]
Journal of Analytical and Applied Pyrolysis. Roč. 73, č. 1 (2005), s. 101-106. ISSN 0165-2370. E-ISSN 1873-250X
R&D Projects: GA AV ČR(CZ) IAA4072107; GA MŠMT(CZ) OC 523.60
Institutional research plan: CEZ:AV0Z40720504
Keywords : selenophene * tellurophene * decomposition
Subject RIV: CC - Organic Chemistry
Impact factor: 1.265, year: 2005
Laser powered homogeneous decomposition of gaseous selenophene and tellurophene (C4H4M, M= Se, Te) is controlled by cleavage of both C-M bonds and it yields elemental heteroatom and a mixture of hydrocarbons. The unprecedented preference of 1-buten-3-yne over ethyne in both C4H4M decompositions allows conclude that the decomposition of the C4H4M molecules takes place via butadienediyl C4H4 diradical that prefers to undergo 1,3-H shift rather than to undergo ?-cleavage. The observed products and their relative amounts allow the first experimental verification of the earlier theoretically predicted routes for decay of the C4H4 diradical into 2 ethyne and 1-buten-3-yne. The results provide the first experimental evidence on the formation of two ethyne molecules not directly from the cis-butadienediyl diradical but from trans-butadienediyl diradical generated by a sequence of steps from intermediate cyclobutadiene.
aserově iniciovaný homogenní rozklad plynných selenofénu a tellurofénu (C4H4M, M= Se,Te) je řízen štěpením obou C-M vazeb a vede ke vzniku heteroatomu a směsi uhlovodíků. Neočekávaná přednost tvorby 1-buten-3-ynu nad tvorbou ethynu v obou rozkladech dovoluje učinit závěr, že rozklad C4H4M molecul se odehrává přes butadienediylový C4H4 diradikál, který přednostně podléhá 1,3-H posunu a ne beta C-C štěpení.
Permanent Link: http://hdl.handle.net/11104/0118305
Number of the records: 1