Chapter 14, Problem 14.13P

Interpretation Introduction

(a)

Interpretation:

The organic product formed when $\text{1-octyne}$ reacts with hydrogen in presence of Lindlar catalyst is to be stated.

Concept introduction:

Lindlar catalyst is a poisonous catalyst which includes ${\text{Pd/CaCO}}_{\text{3}}$. When an alkyne reacts with a Lindlar catalyst, a cis alkene is formed. Lindlar catalyst prevents the further reduction of alkene into alkane.

Interpretation Introduction

(b)

Interpretation:

The organic product formed when $\text{1-octyne}$ reacts with hydrogen is to be stated.

Concept introduction:

Hydrogenation reaction is a reaction in which hydrogen molecule is added to an alkyne or alkene to yield an alkane. It is a reduction reaction. In hydrogenation, a metal catalyst is used to accelerate the reaction.

Interpretation Introduction

(c)

Interpretation:

The organic product formed when $\text{3-ethynylpyridine}$ is reacted with hydrogen in presence of $\text{Pd/C}$ is to be stated.

Concept introduction:

Hydrogenation reaction is a reaction in which hydrogen molecule is added to an alkyne or alkene to yield an alkane. It is a reduction reaction. In hydrogenation, a metal catalyst is used to accelerate the reaction.

Interpretation Introduction

(d)

Interpretation:

The product formed when $\text{2-pentyne}$ is reacted with deuterium in present of Lindlar catalyst is to be stated.

Concept introduction:

Lindlar catalyst is a poisonous catalyst which includes ${\text{Pd/CaCO}}_{\text{3}}$. When an alkyne reacts with a Lindlar catalyst, a cis alkene is formed. Lindlar catalyst prevents the further reduction of alkene into alkane.