Mô tả:
CHEM 2411 – Organic Chemistry I
Conformations of Alkanes and Cycloalkanes-Key
1) Draw a Newman projection of the anti conformation of 1,2-dichloroethane.
Answer:
2) Draw a Newman projection of the gauche conformation of 1,2-dichloroethane.
Answer:
3) Sight along the C2-C3 bond of 2-methylbutane and draw each of the staggered conformations.
Answer:
4) Arrange the following conformations from lowest to highest energy.
Answer:
5) Circle the Most stable conformation of the molecule shown below.
Answer:
6) Circle the Most stable conformation of the molecule shown below.
ANS:
7) Which of the labeled bonds in the structure below are equatorial bonds?
Answer:
a and d
8) Which labeled bonds have a 1,3-diaxial interaction with each other?
Answer:
b and c
9) Draw the ring flip isomer of the structure below and circle the most stable conformation.
Answer:
10) Draw the most stable chair conformation of cis-1,2-dimethylcyclohexane.
Answer:
11) Draw the most stable chair conformation of trans-1-tert-butyl-3-ethylcyclohexane.
Answer:
12) Draw the most stable chair conformation of cis-1-ethyl-3-methylcyclohexane.
Answer:
13) Draw the most stable chair conformation of cis-1-ethyl-4-isopropylcyclohexane.
Answer:
14) D-glucose is a sugar metabolized by our bodies as a source of energy. It has a six-membered
ring with a structure similar to that of cyclohexane. It exists as two stereoisomers, referred to as
alpha and beta, shown below. Draw out the two chair forms of d-glucose and show which
stereoisomer is more stable sterically. (hint: the CH2OH group is always in the equatorial
position.)
15) Provide an acceptable name for the compound below.
Answer: Bicyclo[2.1.1]hexane
16) Provide an acceptable structure for spiro [4.4]nonane.
Answer:
- Xem thêm -
.DOC 
5 
309 
106 
