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Standard X

Chemistry

Nomenclature of Unsaturated Hydrocarbons

Amongest the ...

Question

Amongest the following, the acceptable name as per IUPAC nomenclature is :

pent-4-en-1-yne

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pent-1-en-4-yne

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2, 2-dimethyl-4-ethylpentane

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3-hydroxybutan-1-ol

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Solution

The correct option is B pent-1-en-4-yne
In naming hydrocarbons, alkenes gets position first priority as compared to alkynes so the correct name is pent-1-en-4-yne. But in numbering carbons, alkynes gets higher priority than alkenes.

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Similar questions

Which of the following represents the correct IUPAC name for the compounds concerned?

2, 2-Dimethylpentane or 2-Dimethylpentane

2,4,7- Trimethyloctane or 2,5,7- Trimethyloctance

2-Chloro-4-methylpentane or 4-Chloro-2-methylpentane

But-3-yn-1-ol or But-4-ol-1-yne

Which of the following represents the correct IUPAC name for the compounds concerned? (a) 2,2-Dimethylpentane or 2-Dimethylpentane (b) 2,4,7-Trimethyloctane or 2,5,7-Trimethyloctane (c) 2-Chloro-4-methylpentane or 4-Chloro-2-methylpentane (d) But-3-yn-1-ol or But-4-ol-1-yne

Write structures of the compounds whose IUPAC names are as follows:

(i) 2-Methylbutan-2-ol

(ii) 1-Phenylpropan-2-ol

(iii) 3,5-Dimethylhexane −1, 3, 5-triol

(iv) 2,3 − Diethylphenol

(v) 1 − Ethoxypropane

(vi) 2-Ethoxy-3-methylpentane

(vii) Cyclohexylmethanol

(viii) 3-Cyclohexylpentan-3-ol

(ix) Cyclopent-3-en-1-ol

(x) 3-Chloromethylpentan-1-ol.

Write structures of the compounds whose IUPAC names are as follows.
(a). 2-methylbutan-2-ol

(b). 1-phenylpropan-2-ol

(c). 3,5-dimethylhexane-1,3,5-triol

(d). 2,3-diethylphenol

(e). 1-ethoxypropane

(f). 2-ethoxy-3-methylpentane

(g). Cyclohexylmethanol

(h). 3-cyclohexylpentan-3-ol

(i). Cyclopent-3-en-1-ol

(j). 3-chloromethylpentan-1-ol

Which of the following represents the correct IUPAC name for the compounds concerned?

a) But-3-yn-1-ol

b) But-4-ol-1-yne

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Amongest the following, the acceptable name as per IUPAC nomenclature is :

The correct option is B pent-1-en-4-yneIn naming hydrocarbons, alkenes gets position first priority as compared to alkynes so the correct name is pent-1-en-4-yne. But in numbering carbons, alkynes gets higher priority than alkenes.

The correct option is B pent-1-en-4-yne
In naming hydrocarbons, alkenes gets position first priority as compared to alkynes so the correct name is pent-1-en-4-yne. But in numbering carbons, alkynes gets higher priority than alkenes.