Matches in SemOpenAlex for { <https://semopenalex.org/work/W137887528> ?p ?o ?g. }
Showing items 1 to 69 of
69
with 100 items per page.
- W137887528 abstract "The kinetics of the metathesis of 1-hexene using Re2O7/-Al_2O_3 as the catalyst were investigated under a variety of conditions. The experiments were carried out under high vacuum conditions. The product solutions were characterised by gas liquid chromatography and mass spectroscopy. The initial kinetics of the metathesis of 1-hexene showed that the reaction was first order in the weight of the catalyst and second order in the concentration of 1-hexene. A kinetic scheme which correlated the experimental data with the metallocarbene chain mechanism postulated by Herisson and Chauvin and the kinetics of the reaction was explained using a model based on the Langmuir-Hinshelwood theory. The low conversion of 1-hexene to its products is due to termination reactions which most likely occur by the decomposition of the metallocyclobutane intermediate to produce a cyclopropane derivative and an inactive centre. The optimum temperature for the metathesis of 1-hexene over Re_2O_7/-Al2O3 is 45oC and above this temperature, the rate of metathesis decreases rapidly. Co-catalysts alter the active sites for metathesis so that the catalyst is more selective to the metathesis of 1-hexene. However, the regeneration of metathesis activity is much worse for promoted catalysts than for the unpromoted. The synthesis and metathesis of 4,4-dimethyl-2-allowbreak (9-decenyl)-1,3-oxazoline and 4,4-dimethyl-2-allowbreak (3-pentenyl)-1,3-oxazoline was attempted and the products were analysed by thin layer chromatography, infra-red, 13C and 1H nmr and mass spectroscopy. Obtaining the oxazolines in a good yield with high purity was difficult and consequently metathesis of the impure products did not occur." @default.
- W137887528 created "2016-06-24" @default.
- W137887528 creator A5055687499 @default.
- W137887528 date "1991-01-01" @default.
- W137887528 modified "2023-09-23" @default.
- W137887528 title "Kinetic studies of the metathesis of 1-hexene using Re2O7/γ-Al2O3 and the synthesis and metathesis of oxazolines" @default.
- W137887528 hasPublicationYear "1991" @default.
- W137887528 type Work @default.
- W137887528 sameAs 137887528 @default.
- W137887528 citedByCount "0" @default.
- W137887528 crossrefType "dissertation" @default.
- W137887528 hasAuthorship W137887528A5055687499 @default.
- W137887528 hasConcept C153914509 @default.
- W137887528 hasConcept C161790260 @default.
- W137887528 hasConcept C174499055 @default.
- W137887528 hasConcept C178790620 @default.
- W137887528 hasConcept C185592680 @default.
- W137887528 hasConcept C188027245 @default.
- W137887528 hasConcept C2775944816 @default.
- W137887528 hasConcept C2776685382 @default.
- W137887528 hasConcept C2778597550 @default.
- W137887528 hasConcept C2779200411 @default.
- W137887528 hasConcept C2780378348 @default.
- W137887528 hasConcept C44138296 @default.
- W137887528 hasConcept C44228677 @default.
- W137887528 hasConcept C46094051 @default.
- W137887528 hasConcept C521977710 @default.
- W137887528 hasConceptScore W137887528C153914509 @default.
- W137887528 hasConceptScore W137887528C161790260 @default.
- W137887528 hasConceptScore W137887528C174499055 @default.
- W137887528 hasConceptScore W137887528C178790620 @default.
- W137887528 hasConceptScore W137887528C185592680 @default.
- W137887528 hasConceptScore W137887528C188027245 @default.
- W137887528 hasConceptScore W137887528C2775944816 @default.
- W137887528 hasConceptScore W137887528C2776685382 @default.
- W137887528 hasConceptScore W137887528C2778597550 @default.
- W137887528 hasConceptScore W137887528C2779200411 @default.
- W137887528 hasConceptScore W137887528C2780378348 @default.
- W137887528 hasConceptScore W137887528C44138296 @default.
- W137887528 hasConceptScore W137887528C44228677 @default.
- W137887528 hasConceptScore W137887528C46094051 @default.
- W137887528 hasConceptScore W137887528C521977710 @default.
- W137887528 hasLocation W1378875281 @default.
- W137887528 hasOpenAccess W137887528 @default.
- W137887528 hasPrimaryLocation W1378875281 @default.
- W137887528 hasRelatedWork W138273978 @default.
- W137887528 hasRelatedWork W1496268274 @default.
- W137887528 hasRelatedWork W2022985003 @default.
- W137887528 hasRelatedWork W2044826014 @default.
- W137887528 hasRelatedWork W2048253173 @default.
- W137887528 hasRelatedWork W2049544345 @default.
- W137887528 hasRelatedWork W2057626245 @default.
- W137887528 hasRelatedWork W2059045654 @default.
- W137887528 hasRelatedWork W2074029794 @default.
- W137887528 hasRelatedWork W2300798060 @default.
- W137887528 hasRelatedWork W2314975399 @default.
- W137887528 hasRelatedWork W2333085536 @default.
- W137887528 hasRelatedWork W2333201765 @default.
- W137887528 hasRelatedWork W2340144453 @default.
- W137887528 hasRelatedWork W2563919760 @default.
- W137887528 hasRelatedWork W2907177406 @default.
- W137887528 hasRelatedWork W2953078463 @default.
- W137887528 hasRelatedWork W3036147567 @default.
- W137887528 hasRelatedWork W3159898424 @default.
- W137887528 hasRelatedWork W60269679 @default.
- W137887528 isParatext "false" @default.
- W137887528 isRetracted "false" @default.
- W137887528 magId "137887528" @default.
- W137887528 workType "dissertation" @default.