Structural Elucidation of tmeda-Solvated Alkali Metal Diphenylamide Complexes

✍ Scribed by Alan R. Kennedy; Jan Klett; Charles T. O'Hara; Robert E. Mulvey; Gemma M. Robertson

• Book ID: 102166227
• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 315 KB
• Volume: 2009
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/ejic.200900782

✦ Synopsis

Lithium, sodium and potassium salts of diphenylamine have been prepared by using a deprotonative route and characterised in both, solid state (by X-ray crystallography) and solution (by NMR spectroscopic studies). In each case the metal atom's coordination sphere is completed by coordination to the synthetically important co-ligand N,N,NЈ,NЈ-tetramethylethylenediamine (tmeda). Complexes 1 and 2 [{(tmeda)-M(NPh 2 )} 2 ] (M = Li for 1, Na for 2) can be prepared by treating 1 mol.-equiv. of the parent amine with an equimolar quantity of nBuM and tmeda in hexane solution. In the solid state, 1 and 2 are essentially isostructural, being dimeric with a four-atom M-N-M-N framework. The coordination sphere of each M atom is completed by a bidentate tmeda molecule. Complex 3 [{(tmeda) 3/2 K(NPh 2 )} 2 ] has been prepared in a similar way to 1 and 2 except that benzylpotassium has been