At 25°, photolytically generated cyclopropylphenylcarbene affords phenylcyclobutene (63%, by ring expansion), phenylacetylene (16%, by fragmentation), and only traces (<3%) of the adduct to isobutene; at lower temperatures, however, the latter compound becomes the major product.
在25°时,光解生成的
环丙基苯基碳烯提供苯基
环丁烯(63%,通过扩环),苯基
乙炔(16%,通过断裂),仅痕量(<3%)的加合物生成
异丁烯;然而,在较低温度下,后一种化合物成为主要产品。