In the reaction between CV+ and –OH, one species is acting as the Lewis base, the other as the Lewis acid. (Note: A Lewis acid is not necessarily a proton donor. It is, however, always an electron pair acceptor).

Which reagent is the Lewis acid?

A. CV+
B. –OH

Which reagent is the Lewis base?

A. CV+
B. –OH

Which orbital of the Lewis acid is involved in the reaction?

A.
B. LUMO

Which orbital of the Lewis base is involved in the reaction?

A.
B. LUMO

a, b, b, a

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To determine which reagent acts as the Lewis acid and which reagent acts as the Lewis base in the reaction between CV+ and –OH, we need to understand the concept of Lewis acids and bases.

A Lewis acid is a species that can accept an electron pair, while a Lewis base is a species that can donate an electron pair.

In this reaction, one species is acting as the Lewis acid and the other as the Lewis base.

To determine which reagent is the Lewis acid, we need to identify the species that accepts an electron pair.

To determine which reagent is the Lewis base, we need to identify the species that donates an electron pair.

In the reaction between CV+ and –OH:

- CV+ can be considered as the Lewis acid because it can accept an electron pair.

- –OH can be considered as the Lewis base because it can donate an electron pair.

Now, let's move on to the orbitals involved in the reaction.

The Highest Occupied Molecular Orbital () is the orbital that contains the highest energy electrons in a molecule.

The Lowest Unoccupied Molecular Orbital (LUMO) is the orbital that has the next higher energy level after the and does not have any electrons.

To determine which orbital of the Lewis acid is involved in the reaction, we need to identify whether the or the LUMO of the Lewis acid is involved.

To determine which orbital of the Lewis base is involved in the reaction, we also need to identify whether the or the LUMO of the Lewis base is involved.

Since the question does not provide specific information about the molecular orbitals of CV+ and –OH, it is not possible to determine which specific orbital is involved in the reaction. Therefore, we cannot definitively answer whether it is the or LUMO of the Lewis acid and Lewis base.

In conclusion:

- The Lewis acid in the reaction is CV+.
- The Lewis base in the reaction is –OH.
- The specific orbital involved in the reaction (whether or LUMO) cannot be determined without further information.