Exercício de Química Sintética e Organica Mista (161)

Prévia do material em texto

CHAPTER 7
STEREOCHEMISTRY
SOLUTIONS TO TEXT PROBLEMS
7.1 (c) Carbon-2 is a stereogenic center in 1-bromo-2-methylbutane, as it has four different
substituents: H, CH3, CH3CH2, and BrCH2.
(d) There are no stereogenic centers in 2-bromo-2-methylbutane.
7.2 (b) Carbon-2 is a stereogenic center in 1,1,2-trimethylcyclobutane.
1,1,3-Trimethylcyclobutane however, has no stereogenic centers.
CH3H3C
H3C H
Not a stereogenic center;
two of its substituents are the same.
CH3
CH3
H
H3C
A stereogenic center; the four substituents to which
it is directly bonded [H, CH3, CH2, and C(CH3)2]
are all different from one another.
CH3 CH2CH3C
CH3
Br
BrCH2 CH2CH3C
CH3
H
156
	CHAPTER 7 STEREOCHEMISTRY