Definition of "pentachloride" []

• Any chloride containing five chlorine atoms in each molecule (noun)

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• "It was during this period that he discovered the iminochlorides by the action of phosphorus pentachloride on the acid amides."
• "The latter are obtained by the action of chlorosulphonic acid on aromatic hydrocarbons; a simpler method, however, is to treat the dry alkali sulphonates with phosphorus pentachloride --"
• "The chlorides of these compounds are obtained when phosphorus pentachloride is allowed to act upon the acids, and are as a rule crystalline."