A new trinuclear species containing a Ta(IV)–Ta(IV) bond, Ta3(μ-H)(μ-NMe2)(μ![[double bond, length as m-dash]](http://www.rsc.org/images/entities/char_e001.gif)
NBut)2(NBut)(NMe2)5, has been formed by reductive elimination of H2. Ta2H2(μ-NMe2)2(NMe2)2(NBut)2 has also been isolated. O2 oxidizes the Ta(IV)–Ta(IV) bond to yield Ta3(μ3-O)(H)(μNBut)(μ-NMe2)2(NMe2)4(NBut)2 under
![Graphical abstract: Unexpected formation of a trinuclear complex containing a Ta(iv)–Ta(iv) bond in the reactions of ButN [[double bond, length as m-dash]] Ta(NMe2)3 with silanes](http://hg.y866.cn/compound/lib/scimg/usr/1/C1CC12837J.jpg)
