Promoted by various reductants,the addition of 1-iodo-4-chloro- perfluorobutane to 1-hexene giving 1:1 adduct is reported.Based on these facts,several new redox systems are proposed.
The ab initio calculation have been performed on the addition of LiH to acetylene at RHF/ 3-21G basis set. The geometries and energies of the isolated reactant. molecular complex. transition state and product have bee...The ab initio calculation have been performed on the addition of LiH to acetylene at RHF/ 3-21G basis set. The geometries and energies of the isolated reactant. molecular complex. transition state and product have been determined on the singlet potential energy surface of the ground state. Our results indicate that there is a meta-stable molecular complex near the isolated reactant in the reaction pathway. The process from isolated reactant to molecular complex is a non-bonding-ex- changing reaction process, and the process from molecular complex to product is the rate-controlling step of the reaction. We also estimate the activated entropy and the frequency factor of the rate- controlling step by using the RRKM theory. The FMO analysis for the transition state reveals the HOMO of transition state to be formed from both HOMO-LUMO and HOMO-HOMO interactions.展开更多
Polyfluoroalkyl iodides reacted with olefins in aqueous DMF solution of sodium disulfite under mild conditions to give the corresponding 1:1 adducts in good yields,providing a convenient polyfluoroalkylation method.Th...Polyfluoroalkyl iodides reacted with olefins in aqueous DMF solution of sodium disulfite under mild conditions to give the corresponding 1:1 adducts in good yields,providing a convenient polyfluoroalkylation method.This indicated that R_F radicals were formed in the reaction of polyfluoroalkyl iodides and sodium disulfite.A SET mechanism is proposed for the sulfinatodehalogenation reaction of sodium disulfite.展开更多
Addition of fluoroalkyl iodides to olefins in the presence of hydrogen peroxide(H_2O_(?)) in acetone,acetonitrile or ethanol gave the corresponding 1:1 adducts in good yields.Reaction of fluoroalkyl iodide with dially...Addition of fluoroalkyl iodides to olefins in the presence of hydrogen peroxide(H_2O_(?)) in acetone,acetonitrile or ethanol gave the corresponding 1:1 adducts in good yields.Reaction of fluoroalkyl iodide with diallyl ether(DAE)yielded tetrahydrofuran derivatives,p-Hydroquinone (p-HQ)can partly suppress the reaction.A radical initiation mechanism is proposed.展开更多
文摘Promoted by various reductants,the addition of 1-iodo-4-chloro- perfluorobutane to 1-hexene giving 1:1 adduct is reported.Based on these facts,several new redox systems are proposed.
文摘The ab initio calculation have been performed on the addition of LiH to acetylene at RHF/ 3-21G basis set. The geometries and energies of the isolated reactant. molecular complex. transition state and product have been determined on the singlet potential energy surface of the ground state. Our results indicate that there is a meta-stable molecular complex near the isolated reactant in the reaction pathway. The process from isolated reactant to molecular complex is a non-bonding-ex- changing reaction process, and the process from molecular complex to product is the rate-controlling step of the reaction. We also estimate the activated entropy and the frequency factor of the rate- controlling step by using the RRKM theory. The FMO analysis for the transition state reveals the HOMO of transition state to be formed from both HOMO-LUMO and HOMO-HOMO interactions.
文摘Polyfluoroalkyl iodides reacted with olefins in aqueous DMF solution of sodium disulfite under mild conditions to give the corresponding 1:1 adducts in good yields,providing a convenient polyfluoroalkylation method.This indicated that R_F radicals were formed in the reaction of polyfluoroalkyl iodides and sodium disulfite.A SET mechanism is proposed for the sulfinatodehalogenation reaction of sodium disulfite.
基金This project was supported by the National Natural Science Foundation of China.
文摘Addition of fluoroalkyl iodides to olefins in the presence of hydrogen peroxide(H_2O_(?)) in acetone,acetonitrile or ethanol gave the corresponding 1:1 adducts in good yields.Reaction of fluoroalkyl iodide with diallyl ether(DAE)yielded tetrahydrofuran derivatives,p-Hydroquinone (p-HQ)can partly suppress the reaction.A radical initiation mechanism is proposed.
