28. What is the major product when (CH3)2CHCH2CH,Br is subjected to the following reaction sequence: (i) Mg, (ii) CO2, (iii) H3O+?(A) 3-methyl-1-butanol (B) 2-methyl-2-butanol (C) 4-methyl-1-pentanol(D) 4-methylpentanoic acid (E) 3-methylbutanoic acid

7. Predict the specific rotation of the compound shown.(A) It is impossible to predict; it must be determined experimentally.(B) Because both asymmetric centers are R, the compound is dextrorotatory.(C) Because both asymmetric centers are S, the compound is dextrorotatory.(D) Zero; the compound is achiral.(E) Because this compound represents a racemic mixture, the compound is dextrorotatory.

28. What is the major product when (CH3)2CHCH2CH,Br is subjected to the following reaction sequence: (i) Mg, (ii) CO₂, (iii) H₃O⁺?
(A) 3-methyl-1-butanol
(B) 2-methyl-2-butanol
(C) 4-methyl-1-pentanol
(D) 4-methylpentanoic acid
(E) 3-methylbutanoic acid

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