We recently reported the catalytic Z-selective hydrogenation of internal alkynes with a low valent niobium complex [Nb(BDI)(NtBu)(CO)2] (BDI = N,N'-diisopropylbenzene-�-diketiminate).1 While performing these catalytic studies in aromatic solvents, we became intrigued by the observation of arene complexes. These complexes formed in the absence of CO, presumably by trapping a low coordinate trivalent niobium complex �Nb(BDI)(NtBu)�, which was proposed to be an active species of the catalytic cycle. The study presented here describes the synthesis and characterization of these new Nb arene complexes.(1) Gianetti, T. L.; Tomson, N. C.; Arnold, J.; Bergman, R. G. J. Am. Chem. Soc. 2011  , 133, 14904.

Synthesis and electronic structure of diamagnetic µ-η<sup>6</sup>:η<sup>6</sup>-arene diniobium inverted sandwich complexes

245th National Meeting (2013)

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Synthesis and electronic structure of diamagnetic µ-η6:η6-arene diniobium inverted sandwich complexes

Synthesis and electronic structure of diamagnetic µ-η⁶:η⁶-arene diniobium inverted sandwich complexes