Ta(CNDipp)6 : An Isocyanide Analogue of Hexacarbonyltantalum(0)
- PMID: 28697283
- DOI: 10.1002/anie.201706323
Ta(CNDipp)6 : An Isocyanide Analogue of Hexacarbonyltantalum(0)
Abstract
Hexakis(2,6-diisopropylphenylisocyanide)tantalum is the first isocyanide analogue of the highly unstable Ta(CO)6 and represents the only well-defined zerovalent tantalum complex to be prepared by conventional laboratory methods. Two prior examples of homoleptic Ta0 complexes are known, Ta(benzene)2 and Ta(dmpe)3 , dmpe=1,2-bis(dimethylphosphano)ethane, but these have only been accessed via ligand co-condensation with tantalum vapor in a sophisticated metal-atom reactor. Consistent with its 17-electron nature, Ta(CNDipp)6 undergoes facile one-electron oxidation, reduction, or disproportionation reactions. In this sense, it qualitatively resembles V(CO)6 , the only paramagnetic homoleptic metal carbonyl isolable under ambient conditions.
Keywords: 17-electron complex; disproportionation; isocyanide ligands; metalloradical; tantalum.
© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
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