Question:

A compound with molecular formula $C_4H_4O$ has all the four carbon atoms and the oxygen atom inthe ring. It also has two double bonds. The compound is

Updated On: Jun 23, 2023

Homocyclic and aromatic
Heterocylic and aromatic
Homocyclic but not aromatic
Heterocyclic but not aromatic

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The Correct Option is B

Solution and Explanation

Furan is heterocyclic and aromatic. Here $O$ is $sp^2$ hybridised. One lone pair is present in the unhybridised orbital, while the other is present in hybridised $sp^2$-orbital. The lone pair present in the unhybridised $p$-orbital takes part in $p\pi-p\pi$ bonding. Thus, there are six $\pi$-electrons and as such it is aromatic

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Notes on Organic Chemistry - Some Basic Principles and Techniques

Concepts Used:

Organic Chemistry - Some Basic Principles and Techniques

Organic Chemistry is a subset of chemistry dealing with compounds of carbon. Therefore, we can say that Organic chemistry is the chemistry of carbon compounds and is 200-225 years old. Carbon forms bond with itself to form long chains of hydrocarbons, e.g.CH₄, methane and CH₃-CH₃ ethane. Carbon has the ability to form carbon-carbon bonds quite elaborately. Polymers like polyethylene is a linear chain where hundreds of CH₂are linked together.

Read Also: Organic Compounds

Importance of Organic Chemistry:

Organic chemistry is applicable in a variety of areas including-

Medicines: Example- Aspirin which is a headache medicine and Ibuprofen is a painkiller, both are organic compounds. Other examples include paracetamol.
Food: Example- Starch which is a carbohydrate is an organic compound and a constituent of rice and other grains. It is the source of energy.
Clothing: Example- Nylon, Polyester and Cotton are forms of organic compounds.
Fuels: Examples- Gasoline, Petrol and Diesel are organic compounds used in the automobile industry at large.