The title reactions can be explained by WagnerâMeerwein rearrangement of α-thio carbocations (thionium ions) to β-thio carbocations; this unusual reactivity may be due to superelectrophilic activation by aluminium chloride.
                                    标题反应可以用δ-
硫代碳基(
噻吩离子)到δ-
硫代碳基的瓦格纳-梅尔韦恩重排来解释;这种不寻常的反应性可能是由于
氯化铝的超亲电活化作用。