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Chapter 27: Q 3. (page 1080)

Question: (a) Using Figure 27.2 as a guide, draw the molecular orbitals for hexa-2,4-diene. (b) Label the HOMO and the LUMO in the ground state. (c) Label the HOMO and the LUMO in the excited state.

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01

HOMO and LUMO

The high-energy molecular orbital that contains the electron pair is referred to as the highest occupied molecular orbital (HOMO).

The lowest molecular orbital that does not contain an electron pair is referred to as the lowest unoccupied molecular orbital (LUMO).

02

Structure of hexa-2,4-diene

hexa-2,4-diene

Hexadiene consists of two pi bonds that are made by the overlap of four p orbitals.

03

Molecular orbital diagram of hexa-2,4-diene

Molecular diagram of hexa-2,4-diene

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