The higher reactivity of an alkene or alkyne, as compared to an alkane, is due to
Correct answer: B. Pi bonds
- A. Sigma bonds
- B. Pi bonds
- C. Hydrogen bonds
- D. None of these
Explanation
Pi bonds are formed by the overlap of two parallel p orbitals. Pi bonds are present in alkenes and alkynes, but not in alkanes. The presence of pi bonds leads to electron density above and below the plane of the molecule, which creates a region of high electron density that can react with electrophiles. Pi bonds also restrict rotation around the double or triple bond, which can affect the stereochemistry of the molecule.
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About Fundamental Principles of Organic Chemistry
Organic chemistry begins with carbon compounds classified by carbon skeleton, saturation and functional group. Work includes identifying groups such as hydroxyl, carbonyl, carboxyl and amino, applying basic nomenclature, and distinguishing structural, geometric and optical isomers, where the same molecular formula does not necessarily mean the same structure or properties.
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