Dolbier HW Solutions 283

Dolbier HW Solutions 283 - 277 ARENES AND AROMATICITY B-5....

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B-5. Rank the following compounds in order of increasing rate of solvolysis (S N 1) in aqueous acetone (slowest fastest): ( a )1 , 2 , 3( b )2 , 1 , c )3 , 2 , 1( d , 3 , 2 B-6. When comparing the hydrogenation of benzene with that of a hypothetical 1,3,5-cyclohexa- triene, benzene ______ than the cyclohexatriene. ( a ) Absorbs 152 kJ/mol (36 kcal/mol) more heat ( b ) Absorbs 152 kJ/mol (36 kcal/mol) less heat ( c ) Gives off 152 kJ/mol (36 kcal/mol) more heat ( d ) Gives off 152 kJ/mol (36 kcal/mol) less heat B-7. The reaction gives as the major elimination product ( c ) Equal amounts of ( a ) and ( b ) ( d ) Neither ( a ) nor ( b ) B-8. Which one of the following is best classi f ed as a heterocyclic aromatic compound? B-9. Which of the following has the smallest heat of combustion?
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