Give the structural formula for the following:
(a) Methanoic acid
(b) Ethanal
(c) Ethyne
(d) Acetone
(e) 2-methyl propane
The structural formula of the given compounds based on the rules of IUPAC nomenclature will be:
(a) Methanoic acid
(i) Root word determination: In the given IUPAC name, the root word is ‘Meth’ Which means only one carbon is present in the longest chain.
(ii) Functional group determination: There is the presence of one functional group that is a carboxylic acid and named 'oic acid'.
(iii) Suffix determination: The suffix used is ‘ane’ which means only a single bond is present.
Thus, the structural formula of the compound will be
(b) Ethanal
(i) Root word determination: In the given IUPAC name, the root word is ‘Eth’ Which means two carbon is present in the longest chain.
(ii) Functional group determination: There is the presence of one functional group that is an aldehyde group which is named 'al'.
(iii) Suffix determination: The suffix used is ‘ane’ which means only a single bond is present.
Thus, the structural formula of the compound will be
(c) Ethyne
(i) Root word determination: In the given IUPAC name, the root word is ‘Eth’ Which means two carbon is present in the longest chain.
(ii) Functional group determination: There is the no functional group present.
(iii) Suffix determination: The suffix used is ‘yne’ which means one triple bond is present.
Thus, the structural formula of the compound will be
(d) Acetone
In the given common name, the IUPAC name of the compound will be:
(i) Root word determination: The root word is ‘Prop’ Which means three carbon is present in the longest chain.
(ii) Functional group determination: There is the one functional group present that is ketone group which is named as ‘on’ on the second carbon atom.
(iii) Suffix determination: The suffix used is ‘ane’ which means single bond is present.
Thus, the structural formula of the compound will be and the IUPAC name of the compound will be Propan-2-on.
(e) 2-methyl propane
(i) Root word determination: In the given IUPAC name, the root word is ‘Prop’ Which means three carbon is present in the longest chain.
(ii) Functional group determination: There is the presence of one functional group that is an alkyl group which is named ‘methyl’ on the second carbon atom.
(iii) Suffix determination: The suffix used is ‘ane’ which means only a single bond is present.
Thus, the structural formula of the compound will be