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Which consequence results when steric hindrance obstructs antibonding orbitals?

A)Decreased rotational barrier height
B)Increased reaction rate constant
C)Promotion to higher spin state
D)Weakened ground state binding

💡 Explanation

Weakened binding results because steric hindrance increases the energy needed to occupy antibonding orbitals, so electronic repulsion in the molecule increases. This decreases the molecule's stability, therefore the ground state weakens, rather than stabilizing it and favoring alternative molecular geometries.

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