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1. How many bonding MOs does butadiene have? 2. How many p-orbitals in butadiene can participate...

1. How many bonding MOs does butadiene have?
2. How many p-orbitals in butadiene can participate in pi-bonding?
3. Are the energies of the HUMO and LUMO increased when electrons in a conjugated system are excited?
4. How many antibonding MOs does butadiene have?
5. Does the bonding or antibonding MO have no electron density overlap?
6. How many p-orbitals in ethylene can participate in pi-bonding?
7. How many bonding MOs does ethylene have?
8. How many antibonding MOs does ethylene have?
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Answer #1

1.the butadiene has 4 MOs because it has 4 carbon atoms by this forming 2 bonding MOs and 2 antibonding.

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