Question: What Are Examples Of Aromatic Hydrocarbons?

What is the functional group of aromatic hydrocarbons?

An aromatic functional group or other substituent is called an aryl group.

The earliest use of the term aromatic was in an article by August Wilhelm Hofmann in 1855.

Hofmann used the term for a class of benzene compounds, many of which have odors (aromas), unlike pure saturated hydrocarbons..

What is alicyclic and aromatic?

Alicyclic compounds are those which have a cyclic as well as aliphatic chain attached to the cycle. Aromatic compounds are those which contains a benzene ring . Cyclic compounds are simple ring structures of carbon chained among themselves. Aliphatic compounds are simple , complex long carbon chains.

What are the main sources of aromatic hydrocarbons?

Simple aromatic hydrocarbons come from two main sources: Coal and petroleum. Coal is a complex mixture of a large number of compounds, most of which are long-chain compounds. If coal is heated to about 1000 °C in the absence of air (oxygen), volatile components, the so-called tar oil, are stripped out.

Why are aromatic hydrocarbons dangerous?

Polycyclic aromatic hydrocarbons (PAHs) are made whenever substances are burned. PAHs are also found at former coal-gasification sites. Breathing smoke or coming into contact with contaminated soil exposes people to PAHs. Some PAHs may cause cancer and may affect the eyes, kidneys, and liver.

Is aspirin aliphatic or aromatic compound?

One of the best known aromatic acetates is acetylsalicylic acid, or aspirin, which is prepared by the esterification of the phenolic hydroxyl group of salicylic acid. Aspirin possesses a number of properties that make it the most often recommended drug. It is an analgesic, effective in pain relief.

What is difference between aliphatic and aromatic?

Aliphatic compounds are also known as non-aromatic compounds. Aliphatic compound can be cyclic or not, but only aromatic compounds contain a stable ring of atoms, such as benzene. … Saturated compounds are made up of single bond only while unsaturated compounds are with double bonds (alkenes) or triple bonds (alkynes).

What is another name for aromatic hydrocarbon?

They are also referred to as arenes or aryl hydrocarbons. A few examples of aromatic hydrocarbons are provided below. It can be observed that all these compounds contain a benzene ring. Aromatic Hydrocarbons – Benzene, Toluene and o-Xylene.

Why are they called aromatic hydrocarbons?

Aromatic compounds, originally named because of their fragrant properties, are unsaturated hydrocarbon ring structures that exhibit special properties, including unusual stability, due to their aromaticity. They are often represented as resonance structures containing single and double bonds.

Why are aromatic compounds important?

Aromaticity is important because it makes molecules more stable. Aromatic compounds play important roles in biochemistry and in industry. Amino acids are the building blocks of proteins. Four of them — histidine, phenylalanine, tyrosine, and tryptophan — are aromatic.

What is meant by aromatic?

adjective. having an aroma; fragrant or sweet-scented; odoriferous. Chemistry. of or relating to an aromatic compound or compounds.

What are some examples of aromatic compounds?

What are Aromatic Compounds? Aromatic compounds are chemical compounds that consist of conjugated planar ring systems accompanied by delocalized pi-electron clouds in place of individual alternating double and single bonds. They are also called aromatics or arenes. The best examples are toluene and benzene.

Which is an aromatic hydrocarbon?

An aromatic hydrocarbon or arene (or sometimes aryl hydrocarbon) is a hydrocarbon with sigma bonds and delocalized pi electrons between carbon atoms forming a circle. … The configuration of six carbon atoms in aromatic compounds is called a “benzene ring”, after the simplest possible such hydrocarbon, benzene.

What are monocyclic aromatic hydrocarbons?

Monocyclic aromatic hydrocarbons have diverse ring and side chain structure that could independently affect their absorption and toxicity effectively (Chou et al. 2003). … Among the major monocyclic aromatic hydrocarbons (MAHs) are styrene, benzene, toluene and isomers o-xylene, m-xylene and p-xylene.

Why do aromatic compounds smell?

Remember that the term “aromatic” was originally coined due to a perceived odour of the compounds in question, but for many years now the term has related to increased stability caused by certain types of electron delocalisation.

Which of the following is aromatic compound?

Phenol, Naphthalene, pyridine all are aromatic compounds, while pyridine is a heterocyclic aromatic compound.

What defines an aromatic compound?

Aromatic compound, any of a large class of unsaturated chemical compounds characterized by one or more planar rings of atoms joined by covalent bonds of two different kinds. The unique stability of these compounds is referred to as aromaticity.

How do you identify aromatic hydrocarbons?

For a compound to be considered aromatic, it must be flat, cyclic, and conjugated and it must obey Huckel’s rule. Huckel’s rule states that an aromatic compound must have pi electrons in the overlapping p orbitals in order to be aromatic (n in this formula represents any integer).

What are the principal sources of aliphatic hydrocarbons?

Aliphatic (from Greek aleiphar, “fat”) hydrocarbons derive from the chemical breakdown of fats or oils. They are divided into alkanes, alkenes, and alkynes. Alkanes have only single bonds, alkenes contain a carbon-carbon double bond, and alkynes contain a carbon-carbon triple bond.