Textbook Question
Classify each organic reaction as combustion, alkane substitution, alkene addition or hydrogenation, aromatic substitution, or alcohol substitution, elimination, or oxidation.
d.
22. Organic Chemistry
Benzene Reactions
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The prefix meta- refers to
A
1,1 disubstitution.
B
1,2 disubstitution.
C
1,3 disubstitution.
D
1,4 disubstitution.
E
all of the above disubstitutions.
Verified step by step guidance1
Understand the context: In organic chemistry, the term 'meta-' is used to describe the relative positions of substituents on an aromatic ring, such as benzene.
Identify the positions: In a benzene ring, the carbon atoms are numbered sequentially. The 'meta-' position refers to substituents located at the 1,3-positions on the ring.
Compare with other prefixes: The 'ortho-' prefix refers to 1,2-disubstitution, while the 'para-' prefix refers to 1,4-disubstitution.
Visualize the structure: Draw a benzene ring and label the carbon atoms. Place substituents at the 1 and 3 positions to see the 'meta-' relationship.
Conclude the definition: Recognize that the 'meta-' prefix specifically indicates 1,3-disubstitution, distinguishing it from other positional prefixes.
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