Free-Radical chain mechanism of radical halogenation of alkanes (initiation; propagation, termination) Allylic bromination using NBS mechanism Radical Addition of HBr to alkenes
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- Oxidation of alkenes: Epoxidation, Hydroxylationthe action of halogenated derivatives of alkanes with KOH: CnH2n + 1 Cl + KOH = CnH2n + 2O + KCl is: a) radical substitution b) nucleophilic substitution c) electrophilic substitution d) addition reactionIn free-radical substitution reaction of alkanes with halogens under uv light, the photolytic breaking of the halogen is the rate determining step. the formation of alkylradical is the rate determining step. the formation of halogen radical is the rate determining step. the abstraction of hydrogen from alkane by the halogen radical is the rate determining step
- Which represents an efficient synthetic route to go from an alkane to an alkene? O elimination with NaNH2, followed by a water workup O anti-Markovnikov hydrohalogenation, followed by elimination O radical bromination, followed by elimination O hydration, followed by elimination O hydration, followed by ozonolysis of the double bondDescribe a sequence of reactions by which cis-2-pentene could be prepared from acetylene.10) For the reaction between isopropyl 1-propyl (or 'n-propyl') ether and HBr, which type of reaction best matches the expected products? A) Acid-catalyzed dehydration B) Nucleophilic substitution reaction C) Ether cleavage reaction D) Nucleophilic addition-elimination reaction
- Which of the following statements is/are true regarding Alkene A and the products of an ozonolysis (O_(3)) reaction? (i) One of the alkene carbon atoms of alkene A is disubstituted and the other is monosubstituted (ii) One of the alkene carbon atoms of alkene A is monosubstituted and the other is unsubstituted (iii) Ozonolysis of alkene A followed by work up under reductive conditions gives products 1 and 2, but if work up is under oxidative conditions products 1 and 3 form (iv) Ozonolysis of alkene A followed by work up under reductive conditions gives products 1 and 3 but if work up is under oxidative conditions products 1 and 2 form.. a. (i) and (iii) are true5B In the following reactions, mixtures of alkenes and ethyl ethers are formed. Draw their structures. Explain which is or are likely to be the main product(s) in each reaction. In case of formation of two isomers of alkenes, explain which is formed in greater proportion CH3 CH3 H3C-C H -Br CH3 EtOHUsing reactions, mechanisms, potential energy diagrams, labels, complete sentences, and the associated concepts, explain the following reaction rate trend for the hydrochlorination of alkenes (the addition of HCI). You may assume: 1) the alkenes are all the same higher energy; and, 2) the chloroalkane products are all the same energy; and, 3) the chloroalkane products are lower in energy than the starting alkenes (AGºrx is negative for each reaction).
- The-C=C- bond in alkynes is than the -C-C- bond in alkenes. longer shorter greater O lesser This is the type of reaction undergone by benzene with halogens, nitronuim ion, etc. OAddition O Electrophilic Aromatic Substitution Substitution ONucleophilic Aromatic Addition The bond length of the C-H bond in saturated hydrocarbons. O210 pm 0120 pm 110 pm 101 pmA The dehydrohalogenation of an haloalkane yields an alkene. Which of the two molecules completes the reaction? → CH₂CH=CHCH3 + HBr CH3CHBRCH₂ CH3 pyright © 2003-2022 International Academy of Science. All Rights Reserved. B CH3CHBRCHBrCH3Hydroboration/oxidation of alkenes