Question

Draw all nine structural isomers of heptane (C7H16), give the IUPAC name for each structure

Answer 1

Concepts and reason

The concept of the problem is based on the isomers.

The compounds having the same molecular formula, but different chemical and physical properties are called isomers.

Fundamentals

Structural isomers are the compounds with the same molecular formula but different structures in which atoms are arranged in different manner within the molecule and the phenomena is called structural isomerism.

Structural isomers do not exhibit the same chemical behaviour.

Chain isomers are the compounds which have same molecular formula, but the arrangement and connectivity of carbon atoms present in the molecule is different.

Heptane is an alkane with the molecular formula ${{\rm{C}}_{\rm{7}}}{{\rm{H}}_{{\rm{16}}}}$ . It has seven carbon attached with sixteen hydrogen atoms. It has only carbon-carbon single bond with no functional groups present in the molecule.

The isomer with the longest seven carbon chain is heptane is shown below.

The isomers with longest six carbon chain and one methyl group is substituted at ${\rm{C}} - 2{\rm{ and C}} - 3$ are shown below:

The isomers with longest five carbon chain and two methyl group substituted are shown below:

The isomers with longest four carbon chain and three methyl group substituted at ${\rm{C}} - 2{\rm{ and C}} - 3$ are shown below:

The nine isomers of heptane are as follows:

Ans:

The nine structural isomers of heptane are as follows:

Answer 2

Concepts and reason The concept of the problem is based on the isomers. The compounds having the same molecular formula, but different chemical and physical properties are called isomers. Fundamentals Structural isomers are the compounds with the same molecular formula but different structures in which atoms are arranged in different manner within the molecule and the phenomena is called structural isomerism. Structural isomers do not exhibit the same chemical behaviour. Chain isomers are the compounds which have same molecular formula, but the arrangement and connectivity of carbon atoms present in the molecule is different. Heptane is an alkane with the molecular formula {{\rm{C}}_{\rm{7}}}{{\rm{H}}_{{\rm{16}}}}C 7 ​ H 16 ​ . It has seven carbon attached with sixteen hydrogen atoms. It has only carbon-carbon single bond with no functional groups present in the molecule. The isomer with the longest seven carbon chain is heptane is shown below. heptanc The isomers with longest six carbon chain and one methyl group is substituted at {\rm{C}} - 2{\rm{ and C}} - 3C−2andC−3 are shown below: 21 2-methylhexanc 5 V 3 6 3-methylhexane The isomers with longest five carbon chain and two methyl group substituted are shown below: 2,3-dimethylpentane 4 2 3,3-dimethylpentane 2,4-dimethylpentane 2 2,2-dimethylpentane 3-ethylpentane The isomers with longest four carbon chain and three methyl group substituted at {\rm{C}} - 2{\rm{ and C}} - 3C−2andC−3 are shown below: 3 4 12 2,2,3-trimethylbutane The nine isomers of heptane are as follows: heptane 2-methylhexane 2,3-dimethylpentane 3-methylhexane 3,3-dimethylpentane 2,4-dimethylpentanc 2,2-dimethylpentanc 3-ethyl Ans: The nine structural isomers of heptane are as follows: heptanc 2-methylhexane 2,3-dimethylpentance 3-methylhexane 3,3-dimethylpentanc 2,4-dimethylpentane 2,2-dimethylpentane 3-ethy

Answer 3

Concepts and reason The concept of the problem is based on the isomers. The compounds having the same molecular formula, but different chemical and physical properties are called isomers. Fundamentals Structural isomers are the compounds with the same molecular formula but different structures in which atoms are arranged in different manner within the molecule and the phenomena is called structural isomerism. Structural isomers do not exhibit the same chemical behaviour. Chain isomers are the compounds which have same molecular formula, but the arrangement and connectivity of carbon atoms present in the molecule is different. Heptane is an alkane with the molecular formula {{\rm{C}}_{\rm{7}}}{{\rm{H}}_{{\rm{16}}}}C 7 ​ H 16 ​ . It has seven carbon attached with sixteen hydrogen atoms. It has only carbon-carbon single bond with no functional groups present in the molecule. The isomer with the longest seven carbon chain is heptane is shown below. heptanc The isomers with longest six carbon chain and one methyl group is substituted at {\rm{C}} - 2{\rm{ and C}} - 3C−2andC−3 are shown below: 21 2-methylhexanc 5 V 3 6 3-methylhexane The isomers with longest five carbon chain and two methyl group substituted are shown below: 2,3-dimethylpentane 4 2 3,3-dimethylpentane 2,4-dimethylpentane 2 2,2-dimethylpentane 3-ethylpentane The isomers with longest four carbon chain and three methyl group substituted at {\rm{C}} - 2{\rm{ and C}} - 3C−2andC−3 are shown below: 3 4 12 2,2,3-trimethylbutane The nine isomers of heptane are as follows: heptane 2-methylhexane 2,3-dimethylpentane 3-methylhexane 3,3-dimethylpentane 2,4-dimethylpentanc 2,2-dimethylpentanc 3-ethyl Ans: The nine structural isomers of heptane are as follows: heptanc 2-methylhexane 2,3-dimethylpentance 3-methylhexane 3,3-dimethylpentanc 2,4-dimethylpentane 2,2-dimethylpentane 3-ethy