Arrange the stability of the given gem-diols | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The stability of gem-diols is governed by the bond angles within the ring. In small rings,the internal bond angle is constrained (e.g.,$60^{\circ}

Vedclass · Accepted Answer

$III > II > I$

Vedclass · Answer

(A) The stability of gem-diols is governed by the bond angles within the ring. In small rings,the internal bond angle is constrained (e.g.,$60^{\circ}$ in cyclopropane,$90^{\circ}$ in cyclobutane).When two hydroxyl $(-OH)$ groups are attached to the same carbon,there is significant steric repulsion between them. This repulsion is minimized when the bond angle between the two $-OH$ groups is larger.As the ring size increases from cyclopropane $(I)$ to cyclobutane $(II)$ to cyclopentane $(III)$,the internal bond angle increases,which allows the $-OH$ groups to move further apart,reducing steric hindrance and increasing stability.Therefore,the stability order is $III > II > I$.

Arrange the stability of the given gem-diols in decreasing order:
$I$: Cyclopropane$-1,1-$diol
$II$: Cyclobutane$-1,1-$diol
$III$: Cyclopentane$-1,1-$diol

Similar Questions

Identify $(A)$.

Arrange benzene,$n-$hexane and ethyne in decreasing order of acidic behaviour. Also give reason for this behaviour.

In the reaction,
$C_5H_6 + CH_3COCH_3 \xrightarrow{EtONa/EtOH, \text{heat}} X$,
the product $(X)$ is

Given below are two statements.
Statement $I$: On heating with $KHSO_4$,glycerol is dehydrated and acrolein is formed.
Statement $II$: Acrolein has fruity odour and can be used to test glycerol's presence.
Choose the correct option.

The correct order of heats of combustion of the following compounds is:
$(I)$ Cyclopropane
$(II)$ Cyclobutane
$(III)$ Cyclopentane

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Arrange the stability of the given gem-diols in decreasing order:$I$: Cyclopropane$-1,1-$diol$II$: Cyclobutane$-1,1-$diol$III$: Cyclopentane$-1,1-$diol