View PDF Version
 
DOI: 10.1039/A701930K (Paper) Reference Section for: J. Chem. Soc., Dalton Trans., 1997, 2547-2550

Polyhedral azaborane chemistry. The establishment of members of the hypho-type family [(RH2N)B8H11NHR], where groups R are now other than ethyl

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

Udo Dörfler, John D. Kennedy and Mark Thornton-Pett

Abstract

The reaction of [B9H13(SMe2)] with primary amines NH2R to give eight-boron cluster species [(RH2N)B8H11NHR] is not limited to the case where R = ethyl. We find that the n-butyl, isopropyl and tert-butyl analogues are also readily formed. The structural type is illustrated by a single-crystal X-ray diffraction analysis on the isopropyl member of the family. The reaction proceeds stepwise, via an initial ligand exchange on [B9H13(SMe2)] to give [B9H13(NH2R)], as confirmed by treatment of [B9H13(SMe2)] with NH2But to give [B9H13(NH2But)] followed by treatment with PriH2N to give the mixed species [(PriH2N)B8H11NHBut ], also confirmed by single-crystal X-ray work, and showing that the amine on the starting arachno-{B9H13} residue is the one that finishes in the more intimately bound bridging position.

References

  1. B. M. Graybill, A. R. Pitochelli and M. F. Hawthorne, Inorg. Chem., 1962, 1, 626 CrossRef CAS.
  2. R. Lewin, P. G. Simpson and W. N. Lipscomb, J. Chem. Phys., 1963, 39, 1532 CrossRef CAS.
  3. P. MacKinnon, X. L. R. Fontaine, J. D. Kennedy and P. A. Salter, Collect. Czech. Chem. Commun., 1996, 61, 1773 CrossRef.
  4. G. B. Jacobsen, J. H. Morris and D. Reed, J. Chem. Soc., Dalton Trans., 1984, 415 RSC.
  5. F. Meyer, J. Müller, M. U. Schmidt and P. Paetzold, Inorg. Chem., 1993, 32, 5053 CrossRef CAS.
  6. P. A. Salter, N. N. Greenwood, J. D. Kennedy and M. Thornton-Pett, 1997, to be submitted; J. D. Kennedy, in Boron Chemistry (IMEBORON VI), ed. S. Hermanek, World Scientific, Singapore, 1987, pp. 207–243 Search PubMed; P. A. Salter, Ph.D. Thesis, University of Leeds, 1988.
  7. U. Doerfler, N. P. Rath, L. Barton, C. M. Collins and J. D. Kennedy, J. Chem. Soc., Dalton Trans., 1997, 707 RSC.
  8. P. McArdle, J. Appl. Crystallogr., 1995, 28, 65 CrossRef.
  9. G. Ferguson, J. D. Kennedy, X. L. R. Fontaine, Faridoon and T. R. Spalding, J. Chem. Soc., Dalton Trans., 1988, 2555 RSC.
  10. See, for example, D. Reed, Chem. Soc. Rev., 1993, 22, 109 Search PubMed.
  11. J. D. Kennedy, in Multinuclear NMR, ed. J. Mason, Plenum, New York and London 1987 ch. 8, pp. 221–254 Search PubMed.
  12. H. Nöth and B. Wrackmeyer, Chem. Ber., 1974, 107, 3070; H. Nöth and B. Wrackmeyer, NMR 14. Nuclear Magnetic Resonance Spectroscopy of Boron Compounds, Springer, Berlin, Heidelberg and New York 1978, p. 284(Table LVIII) and refs. therein Search PubMed.
  13. W. McFarlane, Proc. R. Soc. London Ser. A, 1968, 306, 185 CrossRef CAS.
  14. G. M. Sheldrick, Acta Crystallogr., Sect. A, 1990, 46, 467 CrossRef.
  15. G. M. Sheldrick, SHELXL 93, Program for refinement of crystal structures, University of Göttingen, 1993.
Click here to see how this site uses Cookies. View our privacy policy here.