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Bis(η^5-Pentamethylcyclopentadienyl) Complexes of Niobium and Tantalum

Min, Endy Y.-J and Bercaw, John E. and Chen, Shujian and Xue, Zi-Ling (2014) Bis(η^5-Pentamethylcyclopentadienyl) Complexes of Niobium and Tantalum. In: Inorganic Syntheses. No.36. Wiley , Hoboken, NJ, pp. 52-57. ISBN 9781118744871.

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Bent metallocene derivatives having η^5-C_5Me_5 ligands (“permethylmetallocene” derivatives) offer advantages over their η^5-C_5H_5 analogs in that they generally display greater thermal stability and are less prone to dimerize through single-atom bridges. These properties have allowed the development of a rich chemistry of group 3 and 4 d-block and f-block transition metal compounds with pentamethylcyclopentadienyl ancillary ligands. Although permethylniobocene and permethyltantalocene derivatives display reactivities similar to the parent niobocene and tantalocene analogs, their increased electron density at niobium and tantalum, their greater steric crowding, and their higher thermal stabilities offer some advantages in probing fundamental transformations such as α- and β-migratory insertion and elimination processes. Convenient synthetic entry points to these compounds are (η^5-C_5Me_5)_2NbCl_2 and (η^5-C_5Me_5)_2TaCl_2. These compounds can be reduced under dihydrogen to yield (η^5-C_5Me_5)_2MH_3 (M═Nb, Ta), which catalyzes the exchange of molecular hydrogen with benzene-d^6.

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Additional Information:© 2014 by John Wiley & Sons, Inc. Published Online: 11 Apr 2014.
Subject Keywords:bis(η5-pentamethylcyclopentadienyl) dichloroniobium(IV); bis(η5-pentamethylcyclopentadienyl) dichlorotantalum(IV)
Issue or Number:36
Record Number:CaltechAUTHORS:20141215-141605227
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Official Citation:Min, E. Y.-J., Bercaw, J. E., Chen, S. and Xue, Z.-L. (2014) Bis(η5-Pentamethylcyclopentadienyl) Complexes of Niobium and Tantalum, in Inorganic Syntheses: Volume 36 (eds G. S. Girolami and A. P. Sattelberger), John Wiley & Sons, Inc., Hoboken, New Jersey. doi: 10.1002/9781118744994.ch11
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:52823
Deposited By: Ruth Sustaita
Deposited On:15 Dec 2014 23:15
Last Modified:10 Nov 2021 19:44

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