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Q: (c) Outline the mechanism for the bromination of 3-methylcyclobutene.
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Give a complete mechanism for the ionic addition of HBr to 1-methylcyclopentene.
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- Please give the main substitution product for each of the following reactions, and indicate the dominant mechanism: (a) 1-bromopropane + NaOCH3 → (b) 3-bromo-3-methylpentane + NaOC2H5 →Two substitution products result from the reaction between 3-chloro-3-methyl-1- butene with sodium acetate (CH3COO – Na +) in acetic acid under SN1. Identify the products.Treatment of 2-bromo-2-methylbutane with KOH in ethanol yields a mixture of two Alkenes products. What are their likely structures? Show its mechanism.
- CH3 Br,/FeBr3 C3H;BrO 5 Using resonance structures, justify whether the acetyl group of compound 5 will direct the bromination reaction to the meta or ortho/para positions.Elimination of HBr from 2-bromobutane affords a mixture of 1-butene and 2-butene. With sodium ethoxide as base, 2-butene constitutes 81% of the alkene products, but with potassium tert-butoxide, 2-butene constitutes only 67% of the alkene products. Offer an explanation for this difference.Bicyclo-2,5-heptadiene can be prepared in two steps from cyclopentadiene and vinyl chloride. Provide a mechanism for each step.
- You are required to synthesize 2-bromopentane from the reaction between an alkene with HBr. Which alkene, 1-pentene or 2-pentene, should you react with HBr in order to get 2-bromopentane? Give an explanation.OH H₂SO4 HỌC–CH2–CH2CH3 H,C=CH—CH,—CH3 + H₂O Acid-catalyzed dehydration of 1-butanol yields 1-butene as the major product. Draw curved arrows to show the movement of electrons in this step of the reaction mechanism. Arrow-pushing Instructions H2C=CH=CH2CH3 NOC XT + OH₂ HỌC–CH—CH, CH3 I H H-O-HDraw a structural formula of an alkene or alkenes (if more than one) that undergo acid-catalyzed hydration and without rearrangement give 1-methylcyclohexanol as the major product. • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • If more than one structure fits the description, draw them all. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. Separate structures with + signs from the drop-down menu. ● AAVII -85 ? ChemDoodleⓇ Y [F
- Draw a structural formula of an alkene or alkenes (if more than one) that undergo acid-catalyzed hydration and without rearrangement give 1-methylcyclohexanol as the major product. • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • If more than one structure fits the description, draw them all. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. Separate structures with + signs from the drop-down menu. ● VIL ? ChemDoodle Ⓡ Qt Sn [FMention and Write the following reaction mechanisms: a) thermal dehydration of 4-t-butylcyclohexanol with phosphoric acid as catalyst; b) addition of molecular bromine to the C= C double bond of 4-t- butylcyclohexene;The reaction of 1-bromopropane and sodium hydroxide in ethanol occurs by an SN2mechanism. What happens to the rate of this reaction under the following conditions?(a) The concentration of NaOH is doubled.(b) The concentrations of both NaOH and 1-bromopropane are doubled.(c) The volume of the solution in which the reaction is carried out is doubled.