group such as isopropyl or tert-butyl, has been studied. An unprecedented rearrangement of the 1,3-diene was found to take place during the reaction to give a mixture of Fe(CO)3-complex isomers. Tricarbonyl[(1,4-η)-2-isopropyl-5-tert-butyl-cyclohexa-1,3-diene]iron was the predominant product after p-toluenesulfonic acid-catalyzed isomerization of a mixture of isomers. This is in contrast to tricarbonyl[(1
已经研究了Fe(CO)5与其中烷基取代基是空间上需要的基团如异丙基或叔丁基的1-烷氧基-4-烷基-环己-1,3-二烯的反应。发现在反应过程中发生了1,3-二烯的空前的重排,得到了Fe(CO)3-络合物异构体的混合物。三羰基[(1,4-η)-2-异丙基-5-叔丁基-环己-1,3-二烯]
铁是
对甲苯磺酸催化异构体混合物异构化后的主要产物。这与更稳定形式的三羰基[(1,4-η)-1-异丙氧基-4-乙基-或甲基-环己-1,3-二烯]
铁形成对比。因此,Fe(CO)3配合物的异构体的稳定性也由C-4烷基取代基的庞大来控制。