Formation of the novel neopentylidenoborane Me3Si(But)N
B
CHBut from the tantalum neopentylidene complex [(η-C5H5)Cl2Ta
CHBut] by metathesis
Abstract
The aminoiminoborane Me3Si(But)NB[graphic omitted]NBut reacts with the alkylidene complex [(η-C5H5)Cl2Ta
CHBut] at –50 °C to give a (2 + 2) cycloadduct containing a [graphic omitted] ring; on warming to 0 °C cleavage occurs, affording the metathesis products Me3Si(But)N
B
CHBut and [(η-C5H5)Cl2Ta
NBut].