Dimethylenemethane Allenic Compounds

Dimethylenemethane. See Allene under Allenic Compounds A133-R Dimethylketone. See Acetone A33-R Di-(3-methylpentynyl)-3 peroxide. See under Acetylene Hydroperoxides A66-R 2,3-Dimethyl- 1-phenyl- 3 pyrazoli n- 5-one. 

Allenic Compounds are derivs of ollene or propadiene, also called dimethylenemethane, CHj C CHj. Allene was probably first prepd in 1865(Ref 2), but the hydrocarbon was not actually identified until 1872 (Ref 3). A rather general method for the prepn of allene by treating 1,2-dihalopropene with Zn dust in ale, was first used in 1888(Ref 4). Many other methods of prepn are known and some of them are described in Ref 5... 

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See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

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