Assertion: hydrogen fluoride | /r/HasProperty | employed as catalyzing medium
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text: More particularly, it has been found that the reaction between the primary, secondaryand tertiary halides such as tertiary butyl chloride, isopropyl chloride, normal propyl bromide tertiary amyl chloride, and others, with other of the above mentioned compounds having reactive structures, may be effected when hydrogen fluoride is employed as the catalyzing medium.