Concept explainers
(a)
Interpretation:The isomeric relationship between cyclopropylcyclopentane and cyclobutylcyclobutane should beidentified.
Concept introduction:Chiral carbon is any stereocenter attached to four different alkyl substituents. If any two of the substituent happen to be similar the center is regarded as achiral.
The enantiomers are identical chemical compounds that have a mirror-image relationship to each other while diastereomers do not hold similar mirror image relationships.
The molecular models of
The two compounds constitute a pair of constitutional isomers. These kinds of isomers are formed by cleavage and replacement of bonds, unlike the conformational isomers that result due to rotation around the bond.
(a)
Explanation of Solution
Structures of cyclopropylcyclopentane and cyclobutylcyclobutane are illustrated as follows:
The molecular formula for both cyclopropylcyclopentane and cyclobutylcyclobutane is
(b)
Interpretation: The isomeric relationship among
Concept introduction: Chiral carbon is any stereocenter attached to four different alkyl substituents. If any two of the substituent happen to be similar the center is regarded as achiral.
The enantiomers are identical chemical compounds that have a mirror-image relationship to each other while diastereomers do not hold similar mirror image relationships.
The molecular models of
The two compounds constitute a pair of constitutional isomers. These kinds of isomers are formed by cleavage and replacement of bonds, unlike the conformational isomers that result due to rotation around the bond.
(b)
Explanation of Solution
Structures of
are illustrated as follows:
Since cis and trans form represent diastereoisomers therefore
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Chapter 5 Solutions
Organic Chemistry: Structure and Function
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- Cyclopropane (C3H6, a three-membered ring) is more reactive than most other cycloalkanes.(a) Draw a Lewis structure for cyclopropane.(b) Compare the bond angles of the carbon atoms in cyclopropane with those in an acyclic (noncyclic) alkane.(c) Suggest why cyclopropane is so reactive.arrow_forwardThe meiting points and boiling points of two isomeric alkanes are as follows: CH3(CH2);CH3, mp = -57 °C and bp = 126 °C; (CHalsCC(CH3)3, mp = 102 °C and bp = 106 °C. (a) Explain why one isomer has a lower melting point but higher boiling point. (b) Explain why there is a small difference in the boiling points of the two compounds, but a huge difference in their melting points.arrow_forward(a) What is the molecular formula of hexane, the alkane withsix carbonsarrow_forward
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