Question

Number of secondary carbon atoms in the following compound (CH3)2 CHCH2 CH(CH3)2
1) 1
2)2
3)3
4)4

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Answer 1

Answer:

1

Explanation:

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Answer 2

The given compound contains 'one' secondary carbon atom. (Option 1)

• A primary carbon is one which is bonded to only one other carbon by single or multiple bonds. Usually, terminal carbons of a chain are primary.
• A secondary carbon is bonded to two other carbon atoms, and a tertiary carbon forms three bonds with other carbon atoms.
• In the given compound, carbons 1, 5, 6 and 7 are bonded to only one other atom each. Hence, they are primary carbon atoms (1⁰).
• Carbons 2 and 4 are bonded to three other carbon atoms simultaneously. This makes them tertiary carbon atoms (3⁰).
• Carbon 3 is the only atom which is bonded to two other carbons, making it a secondary carbon atom (2⁰).

The given compound contains only one secondary carbon atom-(carbon 3).