Week 17: Organic Acids (LM9) p1

Carboxyl group contain the functional group:

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Carbonyl group contain the functional group:

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Hydroxyl group contain the functional group:

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carboxyl group is derived from the combination of carbonyl and the hydroxyl group thus organic acids are generally referred to as carboxylic acid.

• True

• False

carbonyl group is derived from the combination of carboxyl and the hydroxyl group thus organic acids are generally referred to as carboxylic acid.

• True

• False

Substituted acids are named by locating the position of the substituent group by means of the Greek letters.

What is the name of the carbon (C) right beside the carboxyl group?

• alpha (α)

• beta (β)

• gamma (γ)

• delta (δ)

Answer explanation

These letters refer to the position of the carbon in relation to the carboxyl carbon as illustrated:

Same as in aldehydes, trivial root (ex. butyr-) will be used according to the number of carbon atoms present in the structure followed by the ending -ic acid.

In which naming system do we use the trivial root?

• common name

• IUPAC name

What's the common and IUPAC name of this structure?

• formic acid

• methanoic acid

• butanoic acid

• 2-methylbutanoic acid

What's the common and IUPAC name of this structure?

• acetic acid

• ethanoic acid

• n-butyric acid

• isovaleric acid

What's the common and IUPAC name of this structure?

• n-propionic acid

• propanoic acid

• n-butyric acid

• butanoic acid