Haloalkanes and Haloarenes Test - 8

Benzylic halides are the compounds in which the halogen atom is bonded to an sp³-hybridised carbon atom next to an aromatic ring. For example C₆H₅CH₂Cl.

Certain fully fluorinated compounds are being considered as potential blood substitutes in surgery. So fluorine is the element used in these blood substitutes.

This is example of electrophilic aromatic substitution (EAS) reaction.Single Cl ion replaces hydrogen atom and here FeCl₃ acts as halogen carriers.

p,p’ –Dichlorodiphenyltrichloroethane (DDT) is a colorless, tasteless, and almost odorless known for its pesticidal properties and environmental impacts.

CCl₄ was widely used as a cleaning fluid in industry as a degreasing agent.

The compound finds small scale use as a disinfectant.Around the beginning of the 20th century it was used in medicine as a healing and antiseptic dressing for wounds and sores, although this use is now superseded by superior anticeptics.

The chlorofluorocarbon compounds of methane and ethane are collectively known as freons. They are extremely stable, unreactive, non-toxic, non-corrosive and easily liquefiable gases. Freon 12 (CCl₂F₂) is one of the most common freons in industrial use. It is manufactured from tetrachloromethane by Swarts reaction

Methylene chloride is an organic compound with the formula CH₂Cl₂. This colorless, volatile liquid with a moderately sweet aroma is widely used as a solvent, as a paint remover, as a propellant in aerosols, and as a process solvent in the manufacture of drugs. It is also used as a metal cleaning and finishing solvent.

Most freon, even that used in refrigeration, eventually makes its way into the atmosphere where it diffuses unchanged into the stratosphere. In stratosphere, freon is able to initiate radical chain reactions that can upset the natural ozone balance.