Concept explainers
a) 2,3-Dichloro-4-methylhexane
Interpretation:
The structure corresponding to the IUPAC name 2,3-dichloro-4-methylhexane is to be given.
Concept introduction:
The longest continuous carbon chain in the molecule is chosen. The chain is numbered from the end which gives lowest number to the substituent either halo or alkyl group present. If different halogens are present they are numbered and listed in the alphabetical order while writing the name. If same two alternatives exist for different substituents, then the chain is numbered from the end that gives lowest number to the substituent that has alphabetical preference.
To give:
The structure corresponding to the IUPAC name 2,3-dichloro-4-methylhexane.
b) 4-Bromo-4-ethyl-2-methylhexane
Interpretation:
The structure corresponding to the IUPAC name 4-bromo-4-ethyl-2-ethylhexane is to be given.
Concept introduction:
The longest continuous carbon chain in the molecule is chosen. The chain is numbered from the end which gives lowest number to the substituent either halo or alkyl group present. If different halogens are present they are numbered and listed in the alphabetical order while writing the name. If same two alternatives exist for different substituents, then the chain is numbered from the end that gives lowest number to the substituent that has alphabetical preference.
To give:
The structure corresponding to the IUPAC name 4-bromo-4-ethyl-2-methylhexane.
c) 3-Iodo-2,2,4,4-tetramethylpentane
Interpretation:
The structure corresponding to the IUPAC name 3-iodo-2,2,4,4-tetramethylpentane is to be given.
Concept introduction:
The longest continuous carbon chain in the molecule is chosen. The chain is numbered from the end which gives lowest number to the substituent either halo or alkyl group present. If different halogens are present they are numbered and listed in the alphabetical order while writing the name. If same two alternatives exist for different substituents, then the chain is numbered from the end that gives lowest number to the substituent that has alphabetical preference.
To give:
The structure corresponding to the IUPAC name 3-iodo-2,2,4,4-tetramethylpentane.
d) cis-1-Bromo-2-ethycyclopentane
Interpretation:
The structure corresponding to the IUPAC name cis-1-bromo-2-ethylcyclopentane is to be given.
Concept introduction:
The number of carbon atoms present in a cycloalkane ring determine the parent name of the cycloalkane. If substituents are present the ring is numbered in such a way that lowest number is given to the substituents. While writing the name the substituents are arranged first in their alphabetical order followed by the parent name.
To give:
The structure corresponding to the IUPAC name cis-1-bromo-2-ethylcyclopentane.
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Chapter 10 Solutions
EBK ORGANIC CHEMISTRY
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- Which one of the following statements explain why protecting groups are referred to as “a necessary evil in organic synthesis”? Question 12Select one or more: A. They increase the length and cost of the synthesis B. Every synthesis employs protecting groups C. Protecting group have no role to play in a synthesis D. They minimize the formation of side productsarrow_forwardWhich of the following attributes is a key advantage of the chiral auxiliary approach over the chiral pool approach in asymmetric synthesis? Question 10Select one: A. Chiral auxiliaries are cheaper than chiral pool substrates B. Chiral auxiliary can be recovered and recycled unlike chiral pool substrates. C. The use of chiral auxiliaries provide enantiopure products, while chiral pool reactions are only enantioselective D. The chiral auxiliaries are naturally occurring and do not require synthesisarrow_forwardIn the following molecule, indicate the hybridization and shape of the indicated atoms. CH3 CH3 H3C HO: CI:arrow_forward
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