A double bond consists of
Correct answer: C. one sigma and one pi bond
- A. two sigma bonds
- B. two pi bonds
- C. one sigma and one pi bond
- D. one sigma and two pi bond
Explanation
A double bond is formed by the combination of one sigma bond, resulting from head-on orbital overlap, and one pi bond, resulting from sideways overlap of p orbitals. This combination provides the additional electron density and restricted rotation characteristic of double bonds.Sigma (σ) Bond:A sigma bond is formed by the end-to-end overlap of two atomic orbitals, allowing for effective head-on collision and sharing of electron density along the axis connecting the nuclei of the bonded atoms. In a double bond, there is one sigma bond, which is typically formed by the overlap of sp3 hybridized orbitals or sp2 hybridized orbitals.Pi (π) Bond:A pi bond is formed by the side-to-side overlap of two parallel p orbitals that are perpendicular to the sigma bond axis. In a double bond, the pi bond is created by the overlap of p orbitals from adjacent carbon atoms. The presence of a pi bond restricts rotation around the sigma bond axis and contributes to the overall stability of the double bond
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Hydrocarbons are studied through the structures and reactions of alkanes, alkenes, alkynes and aromatic compounds. Coverage includes free radical substitution in alkanes, electrophilic addition to carbon-carbon multiple bonds, benzene substitution, aromatic stability and the difference between addition reactions of alkenes and substitution reactions of benzene.
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