Question

Help multiple choice ASAP

What is the overall synthetic outcome (look at the final product) of acid-catalysed hydration of alkenes? A. Hydration by Markovnikov's rule B. Hydration against Markovnikov'w rule C. Protonation of the double bond D. Deprotonation of the alkene E. Additon of boron in the syn-fashion against Markovnikov's rule While cis-2-butene is a valid chemical name, there is no such compound as cis-2-nationalist why? A. Higher acidity of hydrogen at an sp-carbon than at an sp^2-carbon B. Higher acidity of hydrogen at an sp-carbon than at an sp^3-carbon C. Different geometry at the carbon with two electron domains and the carbon with three electron domains. D. Lower reactivity of alkynes than alkenes with electrophilic reagents E. Higher electronegativity of sp-carbon, than electronegativity of nitrogen What is the following reaction step? A. Shared first step of E1 and S_N1 B. Second step of alkene hydration C. Shared second step of hydration of propene and hydrohalogenation of propene E. first step of alkene bromination

Answer 1

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Answer for the

14) is option (A), Hydreation proceeds through Markonikov's rule

15) is option (C). Since, alkynes have only one bond in addition to triple bond so, no geometrical isomerism possible incase of alkynes (where as alkenes have two bonds in addition to double bond).

16) is option is (D). Its electrophile H⁺ being attacked by elecron cloud (nucleophile) its a first step in both acid catalysed hydrationa and hydrobromination or any electrophilic addition to alkenes.

17) is option (A). the steric hinderence increases in give order and as a result nucleophilic attack will be difficult.

Hope this will explains your answers.

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