Chapter 14, Problem 74AE

Vitamin ${\text{B}}_{\text{6}}$ is an organic compound whose deficiency in the human body can cause apathy, irritability, and an increased susceptibility to infections. Below is an incomplete Lewis structure, for vitamin ${\text{B}}_{\text{6}}$ . Complete the Lewis structure and answer the following questions. [Hint: Vitamin ${\text{B}}_{\text{6}}$ can be classified as an organic compound (a compound based on carbon atoms). The majority of Lewis structures for simple organic compounds have all atoms with a formal charge of zero. Therefore, add lone pairsand multiple bonds to the structure below to give each atom a formal charge of zero.]

1. How many $\text{σ}$ bonds and $\text{π}$ bonds exist in vitamin ${\text{B}}_{\text{6}}$?
2. Give approximate values for the bond angles marked $\text{a}$ through $\text{g}$ in the structure.
3. How many carbon atoms are ${\text{sp}}^{\text{2}}$ hybridized?
4. How many carbon, oxygen, and nitrogen atoms are ${\text{sp}}^3$ hybridized?
5. Does vitamin ${\text{B}}_{\text{6}}$ exhibit delocalized $\text{π}$ bonding? Explain.