Vinyl carbinol is (a) HO-CH2-CH=CH2 (b) CH3-C(CH2 OH)=CH2 (c) CH3-CH=CH-OH (d) CH3 C(OH)=CH2

Name: Problem 115, Chapter 27: A Complete Resource Book in Chemistry for JEE Main
Uploaded: 2021-09-15T09:14:06-08:00
Duration: 1 min 16 s
Channel: Narayan Hari
Description: Vinyl carbinol is (a) HO-CH2-CH=CH2 (b) CH3-C(CH2 OH)=CH2 (c) CH3-CH=CH-OH (d) CH3 C(OH)=CH2

step 1 In this problem, HO CS2, CH double bond, CH2. So, methyl alcohol is called, methyl alcohol is ca

Vinyl carbinol is (a) HO-CH2-CH=CH2 (b) CH3-C(CH2 OH)=CH2...

Vinyl carbinol is (a) $\mathrm{HO}-\mathrm{CH}_{2}-\mathrm{CH}=\mathrm{CH}_{2}$ (b) $\mathrm{CH}_{3}-\mathrm{C}\left(\mathrm{CH}_{2} \mathrm{OH}\right)=\mathrm{CH}_{2}$ (c) $\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}-\mathrm{OH}$ (d) $\mathrm{CH}_{3} \mathrm{C}(\mathrm{OH})=\mathrm{CH}_{2}$

Vinyl carbinol is
(a) $\mathrm{HO}-\mathrm{CH}_{2}-\mathrm{CH}=\mathrm{CH}_{2}$
(b) $\mathrm{CH}_{3}-\mathrm{C}\left(\mathrm{CH}_{2} \mathrm{OH}\right)=\mathrm{CH}_{2}$
(c) $\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}-\mathrm{OH}$
(d) $\mathrm{CH}_{3} \mathrm{C}(\mathrm{OH})=\mathrm{CH}_{2}$

Key Concepts

Structural Isomerism and Organic Nomenclature

Organic compounds can often be represented by several isomers that involve different connectivities of atoms. Proper identification of the key functional groups, their positions relative to unsaturation (like a vinyl group), and the resulting stability or reactivity is essential in determining systematic names and understanding chemical behavior. This concept ties together the importance of structural analysis and nomenclature rules in organic chemistry.

Carbinol

The term carbinol is an older designation for a hydroxyl-bearing carbon, essentially referring to an alcohol group (–OH) attached to a carbon atom. The labeling as carbinol emphasizes the role of the carbon bearing the –OH group as a central, functional node in the molecule, which is important for understanding reaction mechanisms and naming conventions in organic chemistry.

Vinyl Group

A vinyl group is an unsaturated substituent characterized by the –CH=CH2 moiety. It arises from the ethenyl unit and is significant because its double bond introduces areas of high electron density, making it reactive in addition reactions. This group is foundational in polymer and organic chemistry, influencing the reactivity and physical properties of molecules in which it appears.

Vinyl Alcohol versus Allylic Alcohol

Understanding the difference between a vinyl alcohol and an allylic alcohol is key. In vinyl alcohols the hydroxyl group is directly attached to an sp2-hybridized carbon of a double bond (which results in an enolic form that is typically unstable and prone to tautomerize), whereas in allylic alcohols the –OH group is attached to a saturated carbon adjacent to a double bond. This distinction impacts both the reactivity and the nomenclature of the compounds.

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