Halides anhydrous

Alkyl halides Aryl halides Anhydrous calcium chloride anhydrous sodium, magnesium or calcium sulphate phosphorus pentoxide. 

Protic acids are usually used as catalysts for alkylation with olefins rather than with alkyl halides. Anhydrous hydrogen chloride, in the absence of metal halides, is a catalyst for the alkylation of benzene with terf-butyl chloride only at elevated temperatures96 where an equilibrium with isobutylene may exist. Other alkyl halides and cyclohexene were also reacted with benzene and toluene using this catalyst. 

Unlike their phosphine analogues monotertiary arsines do not readily combine with simple Co" halides. Anhydrous CoX2 with AsEt3 in vacuo forms unstable [Co(X)2(AsEt3)2] species,600 and [Co(I)2(AsPh3)2] has been isolated from nitromethane solution.601... 

Dehydration, simultaneously carboxylic acids from halides Anhydrous alcohol... 

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