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Subject - Organic Chemistry, Environmental Chemistry

CFC is the abbreviation for a group of completely halogenated chlorofluorocarbons which are normally listed together with chlorofluorohydrocarbons (H-CFC). H-CFCs are hydrocarbons in which hydrogen atoms are substituted with chlorine or fluorine. They are low-molecular weight organic compounds of low reactivity, volatile, non-flammable, mostly non-poisonous, and, with the exception of unsaturated compounds, of low toxicity.

Since the 1930s, H-CFCs were produced on an industrial scale and used mostly as refrigerants, as propellants in aerosol cans, as blowing agent for foams, and as solvents.

In the 1980s, it was proven that H-CFCs deplete the ozone layer. Because of their low reactivity, H-CFCs have a large lifespan in the atmosphere (average lifespan varies between 44 and 180 years depending on the product). On June 11, 1990, the International Conference for the Protection of the Ozone Layer in London decided to ban or strongly limit the productions or applications of CFCs and H-CFCs by the year 2000.

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Introduction to the Chemistry of Alkyl HalidesLevel 230 min.

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This learning unit is an introduction to the chemistry of alkyl halides (haloalkanes): Typical reactions, nomenclature, physical properties, syntheses, as well as haloalkanes (alkyl halides) in nature, industry, and agriculture are topics of this learning unit.