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← ScienceWhich outcome results when a large organic molecule absorbs specific frequency photon?
A)Promotion of electron to antibonding orbital✓
B)Breaking of sigma bond into radical species
C)Increase vibrational energy without isomerization
D)Temporary dipole caused resonance stabilization
💡 Explanation
When the photon's energy matches the energy difference between a bonding and an antibonding molecular orbital, an electron is promoted to generate an excited state because of quantized energy absorption, leading to instability and potential photochemical reactions. Therefore, electron promotion results, rather than sigma bond breaking, increased vibration, or stabilized resonance which would require different interactions.
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