1. In an addition reaction to an alkene, the a bood is AJ a nucleopbile B) an el
ID: 562031 • Letter: 1
Question
1. In an addition reaction to an alkene, the a bood is AJ a nucleopbile B) an electrophile C) a leavinggp D) A andB E) B and c 2. Addision reactions of alkenes are characterined by A) formation of a a bond B) addition of two groups across a double bond C) breaking of a x bond D) A and B E) Band C 3. The decrease in tropythe AS value ise ative) observed for alkene addition reactions result from C) the reaction being exothermic 4. Describe the regioselectivity and stereospecificity in the hydrohalogemation of an alkene. A) the breaking of a n and o bond. B) the formation of two o bonds D) twe molecules reacting to form a single moloculk E) the temperature dependence of the AS term. A) Markovnikov orientation with sye-addition B) Markovnikov orientation with anti-addition D)anti-Markovnikov orientation with asi-addition E) Markovnikov orientation with both iyn- and anti-addition . Which of the structures shown depicts the most stable carbocation intermediate formed in the hydrohalogenation reaction shown? HX 8600 0% 0% A) I C) II D) IV E) V 6. Which of the molecules below would be the expected product for the hydrohalopenation of the following alkme with HBr c) D) IV E) V A) I B) II 7. What is the expected Markovnikov addition product from the addition of HI to 2-methyl-2-butene? B) 2-iodo-2-methy butane C) 1-iodo-2 methylbtane D) 1-Hodo-J-methylbutase E) 2-iodo-1-methylbutane 8. What is the expected malor product of the following reacticn? HBr C)111 DIN, E) V A) I Page tExplanation / Answer
1) A) a nucleophile. double bond electron rich act as nucleophile
2) E) B and C
addition of two groups to double bond, that breaks double bond form single bond
3) answer:C
addition compound to double bond is exothemic
4) answer:C) hydrogen halide addtion syn face addition to double bond. double bond solwly converted into single bond
5)
B)II
structure is stable cation (tertiatry cation)
6) Answer:V
7)Answer: B 2-methyl2-iodobutane
7: Answer: C
Structure III is formed through stable carbocation
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