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http://yadda.icm.edu.pl:80/baztech/element/bwmeta1.element.baztech-article-BUJ6-0024-0100

Czasopismo

Polish Journal of Chemistry

Tytuł artykułu

Evidence for Heterolytic Cleavage of C-S Bonds in the Photolysis of 1,3,5-Trithianes

Autorzy Hug, G. L.  Janeba-Bartoszewicz, E.  Filipiak, P.  Pedzinski, T.  Kozubek, H.  Marciniak, B. 
Treść / Zawartość
Warianty tytułu
Języki publikacji EN
Abstrakty
EN The homolytic/heterolytic nature of photolytic C-S bond cleavage was studied in 1,3,5-trithianes. The mechanism of photolysis was refined from previous studies. First, evidence was presented for the existence of a precursor of the biradical-like transient (I) which it self was identified in previous studies. Second, the nature of I was further clarified through methanol-scavenging experiments where the results could be interpreted as lending credibility to the notion that I has significant bipolar character. Kinetic and spectral analyses of transient absorptions, following laser excitation of the trithianes, showed that I was reacting with methanol. Complementary steady-state photolytic quantum yields supported this finding, and additional, but unidentified, stable products from irradiations in methanol were seen in the HPLC. The formation of these products was interpreted as likely arising from a nucleophilic attack of methanol at the carbocationic end of the bipolar structure of I.
Słowa kluczowe
EN trithianes   C-S bond cleavage   photolysis  
Wydawca Polskie Towarzystwo Chemiczne
Czasopismo Polish Journal of Chemistry
Rocznik 2008
Tom Vol. 82, nr 4
Strony 883--892
Opis fizyczny Bibliogr. 13 poz., rys.
Twórcy
autor Hug, G. L.
autor Janeba-Bartoszewicz, E.
autor Filipiak, P.
autor Pedzinski, T.
autor Kozubek, H.
autor Marciniak, B.
  • Faculty of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60-780 Poznan, Poland phone: +48 61 8291327; fax: +48 61 8658008, marcinia@amu.edu.pl
Bibliografia
1. Still I.W.J., in: Bernardi F., Csizmadia I.G., Mangini A., (Eds.), Organic Sulfur Chemistry. Theoretical and Experimental Advances, Elsevier, Amsterdam, 1985, p. 596.
2. Reid S.T., in: Bryce-Smith D., (Eds.), Photochemistry, Burlington House, London, 1982-1988.
3. Kropp P.J., Fryxell G.E., Tubergen M.W., Hager MW., Harris G.D., Jr., McDermott T.P., Jr. and Tornero-Velez R., J. Am. Chem. Soc., 113, 7300 (1991).
4. Fleming S.A. and Jensen A.W, J. Org. Chem., 61, 7040 (1996).
5. Vialaton D. and Richard C., J. Photochem. Photobiol. A: Chem., 136, 169 (2000).
6. Janeba-Bartoszewicz E., Hug G.L., Kozubek H., Urjasz W. and Marciniak B., J. Photochem. Photobiol. A: Chem.,140, 133(2001).
7. SugiyamaN., Yoshioka M., Aoyama H. and Nishio T., Chem. Comm., 1063 (1971).
8. Nishio T., Yoshioka M., Aoyama H. and SugiyamaN., Bull. Chem. Soc. Jpn., 46, 2253 (1973).
9. Janeba-Bartoszewicz E., Hug G.L., Andrzejewska E. and Marciniak B., J. Photochem. Photobiol. A:Chem., 177, 17 (2006).
10. Douglas J.B. and Hydro W.R., J. Am. Chem. Soc., 73, 3507 (1951).
I1. Hawehi Z. El. and Hempel D., J. Prakt. Chem., 21, 286 (1963).
12. Murov S.L., Carmichael 1. and Hug G.L., Handbook of Photochemistry, Marcel Dekker, New York,1993.
13. Thomas M.D. and Hug G.L., Comput. Chem. (Oxford), 22,491 (1998).
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