Chapter 19, Problem 43PE

(a)

Interpretation Introduction

Interpretation:

The structural formula of 2-pentanol has to e drawn.

Concept introduction:

IUPAC Nomenclature:

IUAC gives rules for the naming of chemical compounds. These rules are,

Alcohol is the one of the type of organic compound with general structure of $\text{R-OH}$.

For saturated alcohols, longest chain with hydroxyl group is the parent chain of the compound and remaining groups and atoms are consider as substituent. In systematic name parent chain is ended with -ol suffix.

In the nomenclature, Find the parent chin first then number the carbon atoms in the parent chain by giving lowest number to the hydroxyl substituted carbon followed by designate the other substituent in its position in parent chain.

If more than one same substituent or hydroxyl groups were occurs, add a prefix (di-, tri-, tetra-, etc) in front of parent chain name.

Finally the systematic name was written as, the substituent position number with prefix (di-, tri-, tetra-, etc.) of number of substituents followed by name of the substituent then write the parent chain name (which contains large number of carbon atoms in the chain).

(b)

Interpretation Introduction

Interpretation:

The structural formula of Isopropyl alcohol has to e drawn.

Concept introduction:

Refer part (a).