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Which orbitals are involved in π bonding in SO₃²⁻?

1. pπ-pπ orbitals
2. pπ-dπ orbitals
3. dπ-dπ orbitals
4. sπ-pπ orbitals

Correct answer: pπ-dπ orbitals

Solution

In SO₃²⁻, sulfur can utilize its d-orbitals to form π bonds with oxygen atoms through pπ-dπ overlap, as sulfur has vacant d-orbitals available for bonding.

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