A Lewis acid is a substance that can accept an electron pair. One example of a Lewis acid is SiH₃⁺. Which orbital will the new electron occupy if SiH₃⁺ accepts an electron pair?

i. How are electrons excited? ii. Fill the electrons on the π and/or π* orbitals in the incomplete molecular orbital diagram to show the excited state.

The molecular orbital drawing for the C—F bond of fluoromethane is given below. If there were two more electrons in this bond, where would these electrons go in the molecular orbital drawing?

Determine which kind of molecular orbitals are formed when the following atomic orbitals are combined with each other.

Provide a molecular orbital diagram for trans−hex−3−ene and label all σ and π bonds. Determine and explain whether there will be a free rotation around the C₃−C₄ bond or none.