18. A) Bromination of alkanes is a much slower reaction than chlorination. Which of the following is expected to be the major organic product when 2-methylbutane is allowed to react with Br2 in the presence of light or heat?
CH3
|
CH3CH2CHCH3 + Br2 --light-->
CH3
|
CH3CH2CHCH2Br
(A)
CH3
|
CH3CH2CCH3
|
Br
(B)
CH3
|
CH3CHCHCH3
|
Br
(C)
CH3
|
BrCH2CH2CHCH3
(D)
B) Which of the following statements describes the nucleophilic substitution product obtained from the following reaction of S-2-bromobutane with ammonia and solvent?
CH3
|
H---C
|
Br CH2CH3 --NH3-->
A) This reaction yields R-2-aminobutane as the major substitution product.
B) This reaction yields S-2-aminobutane as the major substitution product.
C) This reaction yields a racemic mixture of alkenes.
D) This reaction yields only the trans alkene.
E) This reaction only yields the cis alkene.