Chapter 17, Problem 17.20P

Interpretation Introduction

(a)

Interpretation: The hybridization of carbon atoms of triple bonds is to be predicted.

Concept introduction: Hybridization is the combination of two or more atomic orbitals to form the same number of hybrid orbitals, each having the same shape and energy. Number of groups around the atom is equal to number of the number of orbitals hybridized to give hybrid atomic orbitals.

Interpretation Introduction

(b)

Interpretation: The type of orbital in which the pi electrons of the triple bond resides is to be predicted.

Concept introduction: Hybridization is the combination of two or more atomic orbitals to form the same number of hybrid orbitals, each having the same shape and energy. Number of groups around the atom is equal to number of the number of orbitals hybridized to give hybrid atomic orbitals.

Interpretation Introduction

(c)

Interpretation: The number of pi electrons that are delocalized in compound A is to be determined.

Concept introduction: A molecule must be cyclic, planar, completely conjugated and should follow Huckel’s rule to be classified as aromatic. According to the Huckel’s rule the number of $\pi$ electrons in the molecule must be equal to $\left(4n+2\right)$.