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Structural Characterization and Dynamic Solution Behavior of the Disodio and Lithio−Sodio Geminal Organodimetallics [{{Ph₂P(Me₃Si)N}₂CNa₂}₂] and [{{Ph₂P(Me₃Si)N}₂CLiNa}₂]

Supporting Info

Katherine L. Hull, Bruce C. Noll, and Kenneth W. Henderson*

Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556-5670

Organometallics, 2006, 25 (17), pp 4072–4074

DOI: 10.1021/om0605635

Publication Date (Web): July 12, 2006

To whom correspondence should be addressed. E-mail: khenders@ nd.edu. Fax: +1 574 631 6652. Tel: +1 574 631 8025.

Abstract

The title disodio complex may be prepared by the double deprotonation of a neutral bis(phosphinimine) ligand using 2 equiv of the strong base n-BuNa, whereas the mixed Li/Na derivative can be prepared by controlled sequential deprotonation, by transmetalation, or by mixing the homometallic analogues. The compounds form dimers with the ligands capping an Na₄ square or a Li₂Na₂ rhomboid, and these are the first examples of R₂C²^- dianions containing a heavy alkali metal to be structurally characterized.

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Published In Issue August 14, 2006
Received June 27, 2006

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Communication

Structural Characterization and Dynamic Solution Behavior of the Disodio and Lithio−Sodio Geminal Organodimetallics [{{Ph₂P(Me₃Si)N}₂CNa₂}₂] and [{{Ph₂P(Me₃Si)N}₂CLiNa}₂]