Issue 10, 2010
From the journal:

Dalton Transactions

Easy access to uranium nucleophilic carbene complexes†

Jean-Christophe Tourneux,a   Jean-Claude Berthet,*a   Pierre Thuéry,a   Nicolas Mézailles,*b   Pascal Le Flochb  and  Michel Ephritikhine*a  

* Corresponding authors

a CEA, IRAMIS, SIS2M, CNRS UMR 3299, Gif-sur-Yvette, France
E-mail: jean-claude.berthet@cea.fr, michel.ephritikhine@cea.fr
Fax: +33 169 08 66 40
Tel: +33 169 08 60 42

b Laboratoire “Hétéroéléments et Coordination”, Ecole Polytechnique, CNRS, Palaiseau Cédex, France
E-mail: nicolas.mezailles@polytechnique.edu
Fax: +33 169 33 44 40
Tel: +33 169 33 44 02

Abstract

Metathesis reactions of UCl4 with Li2C(Ph2PS)2 in Et2O only afforded the tris-carbene complex [{Li(OEt2)}2U{[double bond, length as m-dash]C(Ph2PS)2}3] (1), while the bis- and mono-carbene compounds [U{[double bond, length as m-dash]C(Ph2PS)2}2(THF)2] (2) and [{Li(THF)2}2U{[double bond, length as m-dash]C(Ph2PS)2}Cl4] (3) were obtained by treatment of UCl4 with Li2C(Ph2PS)2 in a mixture of THF and toluene. The bis-carbene complex 2 was also obtained either from the comproportionation reaction of 1 and UCl4 or protonolysis reaction of U(NEt2)4 with H2C(Ph2PS)2 and was transformed into the mono-carbene complex [U{[double bond, length as m-dash]C(Ph2PS)2}Cl2(THF)2] (4) by further reaction with UCl4. The utility of these complexes as precursors is illustrated by the synthesis of the biscyclopentadienyl derivative [Cp2U{[double bond, length as m-dash]C(Ph2PS)2}] (5) by treatment of 3 with TlCp. The crystal structures of [U{[double bond, length as m-dash]C(Ph2PS)2}2(py)2]·1.5py·0.5THF and 5·toluene are reported.

Graphical abstract: Easy access to uranium nucleophilic carbene complexes

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Article information

DOI
https://doi.org/10.1039/B926718M
Article type
Communication
Submitted
30 Oct 2009
Accepted
15 Jan 2010
First published
26 Jan 2010

Dalton Trans., 2010,39, 2494-2496

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Easy access to uranium nucleophilic carbene complexes

J. Tourneux, J. Berthet, P. Thuéry, N. Mézailles, P. Le Floch and M. Ephritikhine, Dalton Trans., 2010, 39, 2494 DOI: 10.1039/B926718M

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