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Chapter 9: Q17E (page 263)

The following cycloalkyne is too unstable to exist. Explain

Short Answer

Expert verified

The linear geometry is distorted in the cyclopentyne and so the molecule is unstable.

Step by step solution

01

Stability of cyclic system with triple bonds

Alkynes are sp hybridized molecules. They have linear geometry and the bond angle is 1800. When the linear geometry is distorted, it results in angular strain and decreased stability. So when alkynes are present in cyclic structures they become unstable.

02

Stability of cyclopentyne

As from above figure we can observe that the triple bond is present in the ring. Triple bonded atom having linear hybridized orbitals. But due to cyclic systems linearity destroyed.

Hence cycloalkynes are less stable.

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Most popular questions from this chapter

Question: How would you carry out the following reactions?

Using any alkyne needed, how would you prepare the following alkenes?

(c) 3-Methyl-1-pentene

What products would you expect from the following reactions?

c. CH3CH2CH2CH2C鈮�CCH3+HBr

How would you prepare the following carbonyl compounds starting from an alkyne (reddish-brown Br)?

b.

Show the terminal alkyne and alkyl halide from which the following products can be obtained. If two routes look feasible, list both.

a.CH3CH2CH2C鈮�CH
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