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Dehydration of (Perfluoroalkyl)tetramethylcyclopentenols
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SYSNO ASEP 0369888 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Dehydration of (Perfluoroalkyl)tetramethylcyclopentenols Tvůrce(i) Čermák, Jan (UCHP-M) RID, ORCID, SAI
Nguyen Thi, T.H. (CZ)
Včelák, Jaroslav (UCHP-M)
Krupková, Alena (UCHP-M) RID, ORCID, SAIZdroj.dok. Molecules. - : MDPI
Roč. 16, č. 5 (2011), s. 4031-4044Poč.str. 14 s. Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova dehydration ; fluorous cyclopentadienes ; cyclopentenols Vědní obor RIV CC - Organická chemie CEP IAA4072203 GA AV ČR - Akademie věd LC06070 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy CEZ AV0Z40720504 - UCHP-M (2005-2011) UT WOS 000290955800041 DOI 10.3390/molecules16054031 Anotace Perfluoroalkyl tetramethylcyclopentenols (alkyl = n-butyl, n-hexyl, n-octyl) were dehydrated to a complex mixture of endo, endo-(perfluoroalkyl) tetramethyl-cyclopentadienes and their endo-, exo-isomers. It was found in preliminary screening experiments that the best reagent for this transformation, giving an 89% yield of isomeric product mixture, was P2O5 in benzene at 80-90 °C. Products were characterized on the basis of their mass spectra and retention time information, and some peaks in the mass spectra were identified from their molecular fragments. Structures were assigned to the three most abundant products of (perfluorohexyl)tetramethylcyclopentenol dehydration. Formal dehydration kinetics showed a second order reaction in benzene but zeroth order with induction period in chlorobenzene, suggesting mass transfer limitations in the more polar chlorobenzene. Some of the products were formed by consecutive isomerization of the others, as shown by the kinetic analysis. Pracoviště Ústav chemických procesů Kontakt Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Rok sběru 2012
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