在试行从Ⅰ经Ⅲ做成Ⅳ时,找出Ⅲ易起消除反应生成Ⅴ和Ⅵ。又找出Ⅴ和Ⅵ及Ⅷ和Ⅸ的C_6-溴原子构型在酸性溶液中能相互变化,所得C_6-α-溴和C_6-β-溴之量几相等,不似C_6氯化物的两立体异构体Ⅹ及Ⅺ符合通常横键较稳定的规则。Ⅹ用酸处理能得产率较佳的Ⅺ,而Ⅺ经同样处理,则其构型几乎不变。 In the pilot from Ⅰ to Ⅲ made Ⅳ, find Ⅲ easy to eliminate the reaction to form Ⅴ and Ⅵ. And found V and VI and Ⅷ and Ⅸ C_6-bromine atom configuration in acidic solution can change each other, resulting C_6-α-bromine and C_6-β-bromine amount of several equal, not like C_6 chloride two stereo Isomers X and XI comply with the rules for the more stable transverse bonds. Ⅹ acid treatment can yield a better yield of Ⅺ, and XI the same treatment, its configuration is almost unchanged.