Benzobenzvalene (naphthvalene; 1) is shown to add SO2 to a lateral bicyclobutane bond with formation of a sulfone 2 and a ‘γ-sultine’ 3. The structure of the latter is unambiguously established by X-ray diffraction. Both adducts extrude SO2 upon direct photolysis at 254 nm and regenerate 1 accompanied by naphthalene in a 1:3 ratio. This result is interpreted in terms of a reversible homolytic cleavage
苯并苯并
戊烯(
萘并
戊烯;1)显示出将SO 2加到侧向双
环丁烷键中,形成了砜2和“γ-异
丁二烯” 3。后者的结构通过X射线衍射明确地确定。两种加合物在254 nm处直接光解后均会挤出SO 2,并以1:3的比例伴随
萘再生1。这一结果被解释在主导,两个,一个可逆均裂方面2和3,以同样的亚磺酰双基5,其通过的SO损失2给出了benzoprefulvene双基6。后者处于单重态时进行闭环至1,或者打开以生成
萘。