Which of the following is a correct name according to IUPAC rules?

2, 3 -

diethylhexane

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3 -

ethyl

- 2 -

methylpentane

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3, 4 -

dimethylpentane

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2 -

ethyl

- 3 -

methylpentane

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Solution

The correct option is B $3 -$ ethyl $- 2 -$ methylpentane
3-ethyl-2methylpentane is correct naming according to IUPAC rules.
Here, different substituents are present, i.e "methyl" and "ethyl", hence alphabetical order has to be followed.

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Q. Following alkanes are wrongly named. Write their correct IUPAC names
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Which of the following is a correct name according to IUPAC rules?

The correct option is B 3−ethyl−2−methylpentane3-ethyl-2methylpentane is correct naming according to IUPAC rules.Here, different substituents are present, i.e "methyl" and "ethyl", hence alphabetical order has to be followed.

The correct option is B $3 -$ ethyl $- 2 -$ methylpentane
3-ethyl-2methylpentane is correct naming according to IUPAC rules.
Here, different substituents are present, i.e "methyl" and "ethyl", hence alphabetical order has to be followed.