The substitution reactions of pentachlorobenzenesulfenyl chloride with saturated alkanes were found to proceed by a free radical chain mechanism where the pentachlorobenzenethiyl radical is the predominant chain-carrying species. The selectivity of this radical could be determined by the investigation of ...
Define alkene. alkene synonyms, alkene pronunciation, alkene translation, English dictionary definition of alkene. n. Any of a series of unsaturated, aliphatic hydrocarbons with a carbon-carbon double bond, having the general formula CnH2n. American Heri
A novel photoinduced intermolecular 1,2-arylheteroarylation of alkenes and the efficient synthesis of valuable polyarylalkanes are reported. The reaction is operationally simple, proceeds under mild conditions and with no additional catalyst and reagents. The strategically designed radical cascade reaction ...
(5), This approach is capable of decoupling the rather complicated competitive Michael addition reaction and free radical polymerization mechanisms, thereby leading to the true key kinetic parameters such as the reaction rate constants and activation energy for the Michael addition reaction polymerization....
To obtain insight into the role of NaOH and further disclose the underlying mechanism, DFT calculations have been carried out. Considering that polar solvent tert-amyl alcohol (t-AmOH) was used and sodium ions exist in the reaction solution, a reaction mediated by sodium hydroxide instead of Zun...
To understand the mechanism, a series of control experiments were performed (Table 3). When 2.0 equiv of TEMPO was introduced under the standard reaction conditions, the yield of 3a was not significantly affected (see Supplementary Information for details), which points away from a radical pathway...
Enantioselective Total Synthesis of (−)-Caldaphnidine O via a Radical Cyclization Cascade Mechanism-exercises-August-1 Mechanism-exercises-August-2 Total Synthesis and Structure Rervision of (-)-IllisimoninA, a Neuroprotective Sesquiterpenoid from the Fruits of Illicium simonsii ...
Preparationof4',4''(5'')-Di-tert-butyldibenzo-18-crown-6BasedonElectrophilicAromaticSubstitution CHEMISTRYLETTERS,2012,41(3):274-276,(SCI:932ES) 50.Guan,Yulei;Yang,Bolun;Oi,Suitao;Yi,Chunhai KineticModelingoftheFree-RadicalProcessduringtheInitiatedThermalCrackingofNormalAlkaneswith ...
Tedder, J. M. Which factors determine the reactivity and regioselectivity of free radical substitution and addition reactions?Angew. Chem. Int. Edn Engl.21, 401–410 (1982). ArticleGoogle Scholar Carestia, A. M., Ravelli, D. & Alexanian, E. J. Reagent-dictated site selectivity in intermolec...
equations for the complete combustion of: (i) methane (ii) ethane. 2. Use the passage below and your knowledge to answer the questions that follow. Methane reacts with bromine to give bromomethane and hydrogen bromide. The mechanism for the reaction is called free-radical substitution and ...