Answer the following questions about 1,3,5-heptatrienyl cation, H,C=C (a) How many antibonding a molecular orbitals are present? (b) Which orbital is the HOMO in UV light?

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Photochemistry

Photochemistry is the part of chemistry that studies the various mechanisms of reactions that are triggered by the presence of light energy. It also helps to study the changes involved in a molecule that can undergo the absorption of radiation.