Question

In the organic compound CH₂ = CH – CH₂ – CH₂ – C ≡ CH, the pair of hybridized orbitals involved in the formation of: C₂ – C₃ bond is ______.

Options

• sp – sp²

• sp – sp³

• sp² – sp³ 

• sp³– sp³

Answer 1

In the organic compound CH₂ = CH – CH₂ – CH₂ – C ≡ CH, the pair of hybridized orbitals involved in the formation of: C₂ – C₃ bond is sp² – sp³.

Explanation:

\[\ce{\overset{1}{C}H2 = \overset{2}{C}H - \overset{3}{C}H2 - \overset{4}{C}H2 - \overset{5}{C} ≡ \overset{6}{C}H}\]

sp² sp² sp³ sp³ sp sp

we know that when both double and triple bonds are present at equivalent positions, then we have to give preference to the double bond.
hence, the numbering of the Carbon chain starts near the double bond. here, it is clear which is the C2-C3 bond. hence, C2-C3 bond is formed by overlap of sp² and sp³ orbitals. 

We can see that the pair of hybridized orbitals involved in the formation of C₂ - C₃ bond is sp² - sp³