View PDF Version
 
DOI: 10.1039/A906649G (Paper) Reference Section for: J. Chem. Soc., Dalton Trans., 1999, 3331-3332

Model for a superbase: synthesis and crystal structure of the mixed-metal/mixed-anion aggregate [NaLi2{N(H)R}2(OR′)]2†

(Note: The full text of this document is currently only available in the PDF Version )

Rebecca Holland, John C. Jeffery and Christopher A. Russell

Abstract

The first structurally characterised example of a hetero-bis-s-block-metal amide–alkoxide complex, [NaLi2{N(H)R}2(OR′)]2 (1, R = 2-methoxyphenyl, R′ = tert-butyl), has been shown to be constructed from fusing four LiNNaO heterobimetallic rings with two Li2N2 rings through shared edges to form a cyclic ladder; the complex may serve as a model for “superbases” that are widely employed in organic synthesis.

References

  1. R. E. Mulvey, Chem. Soc. Rev., 1998, 27, 339 RSC.
  2. R. Snaith and D. S. Wright, in Lithium Chemistry: A Theoretical and Experimental Overview, John Wiley and Sons, Inc., New York, 1995, p. 227 Search PubMed.
  3. S. Harder and A. Streitwieser, Angew. Chem., 1993, 105, 1108 CAS; Angew. Chem., Int. Ed. Engl., 1993, 32, 1066 Search PubMed.
  4. R. Pi, W. Bauer and P. v. R. Schleyer, J. Organomet. Chem., 1986, 306, C1 CrossRef CAS.
  5. L. Lochmann and D. Kim, J. Organomet. Chem., 1971, 28, 153 CrossRef CAS.
  6. C. Schade and P. v. R. Schleyer, Adv. Organomet. Chem., 1987, 27, 169 CAS.
  7. F. M. Mackenzie, R. E. Mulvey, W. Clegg and L. Horsburgh, J. Am. Chem. Soc., 1996, 118, 4721 CrossRef CAS.
  8. R. E. Mulvey, Chem. Soc. Rev., 1991, 20, 167 RSC.
  9. K. Gregory, R. Snaith and P. v. R. Schleyer, Adv. Inorg. Chem., 1991, 37, 47 CrossRef CAS.
  10. A. Mordini, in Advances in Carbanion Chemistry, ed. V. Snieckus, JAI Press, London, 1992, vol. 1, p. 1 and references therein Search PubMed.
  11. SMART diractometer control software, Siemens Analytical X-Ray Instruments Inc., Madison, WI, 1994.
  12. T. Kottke and D. Stalke, J. Appl. Crystallogr., 1993, 26, 615 CrossRef.
  13. SADABS absorption correction software, Siemens Analytical X-Ray Instruments Inc., Madison, WI, 1994.
  14. G. M. Sheldrick, SHELXTL, Madison, WI, 1995.
Click here to see how this site uses Cookies. View our privacy policy here.