About: Dehydration of (Perfluoroalkyl)tetramethylcyclopentenols

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	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. 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. (en)
Title	Dehydration of (Perfluoroalkyl)tetramethylcyclopentenols Dehydration of (Perfluoroalkyl)tetramethylcyclopentenols (en)
skos:prefLabel	Dehydration of (Perfluoroalkyl)tetramethylcyclopentenols Dehydration of (Perfluoroalkyl)tetramethylcyclopentenols (en)
skos:notation	RIV/67985858:_____/11:00369888!RIV12-AV0-67985858
http://linked.open...avai/riv/aktivita	I P Z
http://linked.open...avai/riv/aktivity	I, P(IAA4072203), P(LC06070), Z(AV0Z40720504)
http://linked.open...iv/cisloPeriodika	5
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Čermák, Jan Včelák, Jaroslav Krupková, Alena
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav chemických procesů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	193168
http://linked.open...ai/riv/idVysledku	RIV/67985858:_____/11:00369888
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	dehydration; fluorous cyclopentadienes; cyclopentenols (en)
http://linked.open.../riv/klicoveSlovo	cyclopentenols fluorous cyclopentadienes dehydration
http://linked.open...odStatuVydavatele	CH - Švýcarská konfederace
http://linked.open...ontrolniKodProRIV	[607391BA3D44]
http://linked.open...i/riv/nazevZdroje	Molecules
http://linked.open...in/vavai/riv/obor	CC
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Novel fluorophilic ligands for transition metal complexes based on polyfluorinated The structure and synthetic applications of transition metal complexes
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	16
http://linked.open...iv/tvurceVysledku	Krupková, Alena Nguyen Thi, T. H. Včelák, Jaroslav Čermák, Jan
http://linked.open...ain/vavai/riv/wos	000290955800041
http://linked.open...n/vavai/riv/zamer	Investigation of multiphase reacting systems for the design of processes important in synthesis and preparation of novel materials, in energy production and in environmental protection
issn	1420-3049
number of pages	14 (xsd:int)
http://bibframe.org/vocab/doi	10.3390/molecules16054031

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