Question

Q.3 How would you name the following Compounds- ​

Answer 1

Answer:

1) Propanoid acid

2) Ethanal

3) Pent-1-yne or Pentyne

4) Butane

Explanation: (All names are according to IUPAC)

1) Propanoic acid

• Reasons
• There are 3 carbons with one of them being a carboxylic acid group
• Therefore we  Give it the word root of 'Propan-'
• Secondary suffix would be '-oic acid'
• Propanoic acid will be the name.

2)Ethanal

• Reasons

• There are 2 carbons with one of them being an aldehyde group.
• Therefore we name give it a word root of 'Ethan-'
• The secondary suffix will be '-al'
• The name will be Ethanal.

3) Pentyne

• Reasons
• There are 5 carbons with carbon on first position having a triple bond
• Therefore we can name it a word root of 'Pent-'
• The primary suffix will be '-yne' because of triple bond
• The name will be Pentyne

4) Butane

• Reasons
• There are 4 carbons all having single bond
• Therefore we give it a word root of 'But-'
• There are all single bonds so we give it a primary suffix '-ane'.
• The name will be butane.

NOTE

( Secondary Prefix + Primary Prefix + Word Root + 1° suffix + 2° suffix)

( Substituents   + Cyclo/bicyclo + Carbon atom number + saturation(double triple bond)    + Functional group )