The numbering in alkenyl groups is started from the carbon with double bond.

True

No worries! We‘ve got your back. Try BYJU‘S free classes today!

False

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is B False
The numbering in alkenyl groups is started from the carbon with free valency.
For example, $C H_{3} - C H = C H -$ is named as 1-propenyl.
Also, $C H_{3} - C H = C H - C H_{2} -$ is named as 2-butenyl.

Suggest Corrections

Similar questions

In dehydrohalogenation reactions the preferred product is that alkene which has the greatest number of alkyl groups attached to the doubly bonded carbon atoms. This rule is known as:

What is the correct match of the number of bonds along with their nomenclature?

1. Single-Bonded Carbon chain A. Word Root + ane

2. Double-Bonded Carbon chain B. Word Root + yne

3. Triple-Bonded Carbon chain C. Word Root + ene

Q. Number substituted cycloalkenes in the way that gives the carbon atoms of the double bond the

1

and

2

positions and that also gives the substituent groups the lower numbers at the first point of difference. With substituted cycloalkenes it is not necessary to specify the position of the double bond since it will always being with

C 1

and

C 2

. The examples shown here illustrate the application of these rules:

Q. Ordinarily the barrier to rotation about a carbon-carbon double bond is quite high but in compound P double bond between two rings was observed by NMR to have a rotational energy barrier of only about 20 cal/mol, showing that it has lot of single bond character.

The reason for this is

Q. In alkene the bond length of carbon carbon double bond

(> C = C <)

is:

Join BYJU'S Learning Program

The numbering in alkenyl groups is started from the carbon with double bond.

The correct option is B FalseThe numbering in alkenyl groups is started from the carbon with free valency.For example, CH3−CH=CH− is named as 1-propenyl.Also, CH3−CH=CH−CH2− is named as 2-butenyl.

The correct option is B False
The numbering in alkenyl groups is started from the carbon with free valency.
For example, $C H_{3} - C H = C H -$ is named as 1-propenyl.
Also, $C H_{3} - C H = C H - C H_{2} -$ is named as 2-butenyl.