Anhydrous example sentences

When benzene is treated with an alkyl halide in the presence of anhydrous aluminium chloride, alkylbenene is formed.Arenes react with halogens in the presence of a Lewis acid like anhydrous FeCl3, FeBr3 or AlCl3 to yield haloarenes.n-Alkanes on heating in the presence of anhydrous aluminium chloride and hydrogen chloride gas isomerise to branched chain alkanes.During chlorination, alkylation and acylation of benzene, anhydrous AlCl3, being a Lewis acid helps in generation of the elctrophile Cl?, R?, RC?O (acylium ion) respectively by combining with the attacking reagent.Drying agent like anhydrous calcium chloride (or phosphorus penta-oxide) is placed for a few hours in the box.