Flammable gases alkynes

Another analogous series of unsaturated hydrocarbons that contain just one multiple bond, but, instead of being a double bond, it is a triple bond is the alkynes. The names of all the compounds end in -yne. The only compound m this series that is at all common happens to be an extremely hazardous material. It is a highly unstable (to heat, shock, and pressure), highly flammable gas that is the first compound in the series. This two-carbon unsaturated hydrocarbon with a triple bond between its two carbon atoms is called ethyne, and indeed this is its proper name. It is, however, known by its common name, acetylene. 

DOT Label Flammable Gas, UN 1001 Formula C2H2 MW 26.04 CAS [74-86-2] Structure HC=CH, first member of the alkyne homolog series Synonyms ethyne ethine... 

Acetylene (Figure 9.3) is an alkyne, a class of hydrocarbons characterized by carbon-carbon triple bonds involving 6 shared electrons. Acetylene is a highly flammable gas that forms dangerously explosive mixtures with air. It is used in large quantities as a chemical raw material. Acetylene is the fuel in oxyacetylene torches used for cutting steel and for various kinds of welding applications. 

The simplest alkene is ethene, the compound which has previously been called ethylene . Ethene is produced in large quantities because it is one of the most important substances in the production of a wide variety of organic compounds and technological materials. The parent alkyne is ethyne which is marketed under the trade name of acetylene . This substance is also a very important industrial product. Both ethene and ethyne are flammable ethyne mixed with oxygen produces a very hot flame so acetylene is used for gas welding. Ethyne can be easily prepared from calcium carbide and water ... 

In academic labs, hydrogenation experiments are usually done on small quantities of reagents, usually less than 1 gram of an alkene or alkyne. In these situations, it is not necessary to worry about the inherent exothermicity of the reaction. However, on larger scale reactions, it is wise to consider how much heat will be liberated and if there are circumstances that might result in a reaction that could go out of control. Some of the catalysts used in hydrogenations are air-sensitive and should be added to a flask first under a blanket of nitrogen gas, before any flammable solvent is added. It is best to... 

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