10- Which of the following Newman projections represents the most stable conformation of butane? CH3 HH H H 1 CH3 H H H CH3 H 2 H CH3 H H CH3 H CH3 3 H HC H -CH3 CH

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Chapter1: Chemical Foundations
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Q 10 please
5- Ethanol (CH₂CH₂OH) and dimethyl ether (CH3OCH,) are best considered:
A- Constitutional isomers B-stereoisomers
C- enantiomers
D- diastereomers
6- Which of the following is the most stable conformation of cis-1-tert-butyl-4-methylecyclohexane?
CH₂
(H₂C)3C.
CH3
A
1
C(CH3)3
7- Which of the following is the most stable conformation of trans-1-isopropyl-3-methylcyclohexane?
CH(CH3)2
CH(CH₂)2
H
H
1
(H₂C) C.
H3C
CH3
H
2
2
H.
H
8- Which of the following structures represents trans-1,2-dimethylcyclohexane?
H₂C
CH3
9- The eclipsed and staggered forms of ethane are said to differ in_
A- molecular formula
B- configuration
H
2
2
H
CH3
-CH₂
10- Which of the following Newman projections represents the most stable conformation of butane?
CH3
HH
3
H
CH(CH₂)2
H
CH₂
3
CH3
H
CH₂
H
CH3
3
C(CH3)3
C-conformation
H₂C
CH(CH₂)2
H
CH₂
-CH₂
CH3
D- constitution
Transcribed Image Text:5- Ethanol (CH₂CH₂OH) and dimethyl ether (CH3OCH,) are best considered: A- Constitutional isomers B-stereoisomers C- enantiomers D- diastereomers 6- Which of the following is the most stable conformation of cis-1-tert-butyl-4-methylecyclohexane? CH₂ (H₂C)3C. CH3 A 1 C(CH3)3 7- Which of the following is the most stable conformation of trans-1-isopropyl-3-methylcyclohexane? CH(CH3)2 CH(CH₂)2 H H 1 (H₂C) C. H3C CH3 H 2 2 H. H 8- Which of the following structures represents trans-1,2-dimethylcyclohexane? H₂C CH3 9- The eclipsed and staggered forms of ethane are said to differ in_ A- molecular formula B- configuration H 2 2 H CH3 -CH₂ 10- Which of the following Newman projections represents the most stable conformation of butane? CH3 HH 3 H CH(CH₂)2 H CH₂ 3 CH3 H CH₂ H CH3 3 C(CH3)3 C-conformation H₂C CH(CH₂)2 H CH₂ -CH₂ CH3 D- constitution
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