What mechanistic intermediate is used to explain the preference for addition of the Br atom, of HBr, to the internal carbon of a terminal alkyne?

Select the best word or phrase that completes each sentence: (carbocation, carbanion, SN1, SN2, E1, E2, syn, anti, syn, less, cis, trans, E, Z, more, nucleophiles, electrophiles, hyperconjugation, diastereomers, alkyl halides, 1,2-hydride, 1,2-alkyl, inversion, epoxides, ethers, alcohols, phenols, thiols, enols, elimination, nucleophilic substitution, addition, alkanes, alkenes, Markovnikov’s, Hammond’s, Zaitzev’s).    ……………………………. must undergo addition reactions because they have easily broken

Which of the following will yield 2-methylpentane upon catalytic hydrogenation?

Select the best word or phrase that completes each sentence: (carbocation, carbanion, SN1, SN2, E1, E2, syn, anti, syn, less, cis, trans, E, Z, more, nucleophiles, electrophiles, hyperconjugation, diastereomers, alkyl halides, 1,2-hydride, 1,2-alkyl, inversion, epoxides, ethers, alcohols, phenols, thiols, enols, elimination, nucleophilic substitution, addition, alkanes, alkenes, Markovnikov’s, Hammond’s, Zaitzev’s).    ……………………………. must undergo addition reactions because they have easily broken

Select the best word or phrase that completes each sentence (alkynes, enol, keto, with, without, aldehydes, tautomers, acetylide, ionic, resonance, higher,  lower,  decreases, increases,  rotation, alkenes, ketones, carboxylic acids, nitrogen, bromine, chlorine, oxygen, cis, trans, anti, dihydroxylation, epoxidation, oxidative, reduction, syn,  alkylation, odd, even, hydroboration, regioselective, above , below, allylic)   ………………….  tautomers have an O-H group bonded to a C=C.    Complete word/phrase and correct spelling (verbatim) is required. No partial credit.

What product is formed when 1-pentene reacts with Cl2?

What is the major product obtained from the following reaction?  

Select the best word or phrase that completes each sentence (alkynes, enol, keto, with, without, aldehydes, tautomers, acetylide, ionic, resonance, higher,  lower,  decreases, increases,  rotation, alkenes, ketones, carboxylic acids, nitrogen, bromine, chlorine, oxygen, cis, trans, anti, dihydroxylation, epoxidation, oxidative, reduction, syn,  alkylation, odd, even, hydroboration, regioselective, above , below, allylic)   ………………….  tautomers have an O-H group bonded to a C=C.    Complete word/phrase and correct spelling (verbatim) is required. No partial credit.

Which of the structures shown depicts the most stable carbocation intermediate formed in the hydrohalogenation reaction shown?  

Which of the statements is most correct regarding the products expected from the halogenation reaction shown below?