Chapter 17, Problem 100APP

(a)

Interpretation Introduction

Interpretation: The IUPAC name of the following compound should be determined:

Concept Introduction: An organic compound in which carboxy functional group that is -COOH is bonded to the carbon atom is said to be a carboxylic acid. The general formula for carboxylic acid is RCOOH or RCO₂H.

In order to give the name to the carboxylic acid group, the following steps are followed:

1. The parent (longest) alkane chain is identified.

2. The ending of the parent chain from alkane (-e) is changed to -oic acid for a carboxylic acid group.

3. The numbering is of the chain is done in such a way that carbonyl carbon gets the smaller number.

4. Name should be written in alphabetical order and other substituents are shown by the number.

For number of carbons atoms chain, the prefix is given as:

Carbon-1  meth

Carbon-2  eth

Carbon-3  prop

Carbon-4  but

Carbon-5  pent

Carbon-6  hex

Carbon-7  hept

Carbon-8  oct

Carbon-9  non

Carbon-10  dec

(b)

Interpretation Introduction

Interpretation: The IUPAC name of the following compound should be determined:

Concept Introduction: An organic compound in which carboxy functional group that is -COOH is bonded to the carbon atom is said to be a carboxylic acid. The general formula for carboxylic acid is RCOOH or RCO₂H.

In order to give the name to the carboxylic acid group, the following steps are followed:

1. The parent (longest) alkane chain is identified.

2. The ending of the parent chain from alkane (-e) is changed to -oic acid for a carboxylic acid group.

3. The numbering is of the chain is done in such a way that carbonyl carbon gets the smaller number.

4. Name should be written in alphabetical order and other substituents are shown by the number.

For number of carbons atoms chain, the prefix is given as:

Carbon-1  meth

Carbon-2  eth

Carbon-3  prop

Carbon-4  but

Carbon-5  pent

Carbon-6  hex

Carbon-7  hept

Carbon-8  oct

Carbon-9  non

Carbon-10  dec

(c)

Interpretation Introduction

Interpretation: The IUPAC name of the following compound should be determined:

Concept Introduction: An organic compound in which carboxy functional group that is -COOH is bonded to the carbon atom is said to be a carboxylic acid. The general formula for carboxylic acid is RCOOH or RCO₂H. When -H of the carboxylic acid is replaced by an alkyl or aryl group (-R’) then it results in the formation of an ester having general formula RCOOR’.

The reaction which results in the formation of at least one ester along with water on heating acids with alcohols is said to be esterification.

So, in order to give the IUPAC name to the esters, the following steps are followed:

1. The alkyl substituent from the alcohol is named first.
2. The name of the parent chain from carboxylic acid part is replaced as carboxylate.

In order to write the common name of the esters, the common of acids are written from which the ester has been formed.