Name: Structure of Benzene
Uploaded: 2019-07-19
Duration: 3 min 53 s
Description: Benzene is the most commonly known aromatic compound and is a significant part of gasoline. In this video, we will study the structure and properties of benz...

Question

Write structural formulae of the following compounds: propane, ethyne, cyclobutane, ethene, benzene.

Accepted Answer

The IUPAC name propane indicates that the parent chain consists of three carbon atoms and hence the root word is 'prop'. All the valencies of carbon atoms are satisfied by single bonds as the root word ends with 'ane'. Therefore, the structure of propane with the chemical formula $C_{3} H_{8}$ is given below:

The IUPAC name ethyne indicates that the parent chain consists of two carbon atoms and hence the root word is 'eth'. The valencies of carbon atoms are satisfied by hydrogen and a triple bond is present between the carbon atoms as the root word ends with 'yne'. Therefore, the structure of ethyne with the chemical formula $C_{2} H_{2}$ is given below:

The IUPAC name cyclobutane indicates that it is a cyclic compound consists of four carbon atoms and hence the root word is 'but'. All the valencies of carbon atoms are satisfied by single bonds as the root word ends with 'ane'. Therefore, the structure of cyclobutane with the formula $C_{4} H_{8}$ is given below:

The IUPAC name ethene indicates that the parent chain consists of two carbon atoms and hence the root word is 'eth'. The valencies of carbon atoms are satisfied by hydrogen and a double bond is present between the carbon atoms as the root word ends with 'ene'. Therefore, the structure of ethene with the chemical formula $C_{2} H_{4}$ is given below:

Benzene is an aromatic hydrocarbon with the molecular formula $C_{6} H_{6}$ . It has delocalised alternative $π$ bond system that makes benzene a stable compound. The structural formula of benzene is given below:

Write structural formulae of the following compounds: propane, ethyne, cyclobutane, ethene, benzene.

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