Synthesis and structure of an anionic aluminium–nitrogen compound containing a ladder-shaped core

Abstract

An X-ray crystallographic study of the aluminium–nitrogen compound C₅₂H₇₈Al₄Li₂N₄ showed it to possess a ladder-shaped (AlN)₄ core. The mesityl ligands of the inner nitrogen atoms are each metallated by one of their neighbouring aluminium atoms, while on the outer negative charge is localised. The reported structure is the first tetrameric anionic Al–N compound.

References

1. G. M. Sheldrick and W. S. Sheldrick, J. Chem. Soc. A, 1969, 2279.
2. M. A. Petrie, K. Ruhlandt-Senge and P. P. Power, Inorg. Chem., 1993, 32, 1135; K. M. Waggoner, K. Ruhlandt-Senge, R. J. Wehmschulte, X. He, M. M. Olmstead and P. P. Power, Inorg. Chem., 1993, 32, 2557.
3. S. J. Schauer and G. H. Robinson, J. Coord. Chem., 1993, 30, 197.
4. S. Schulz, L. Häming, R. Herbst-Irmer, H. W. Roesky and G. M. Sheldrick, Angew. Chem., 1994, 106, 1052; Angew. Chem., Int. Ed. Engl., 1994, 33, 969.
5. K. M. Waggoner and P. P. Power, J. Am. Chem. Soc., 1991, 113, 3385.
6. G. H. Robinson, F. Moise, W. T. Pennington and S. A. Sangokoya, Polyhedron, 1989, 8, 1279.
7. M. Cesari and S. Cucinella, in The Chemistry of Inorganic, Homoand Heterocycles, eds. I. Haiduc and D. B. Sowerby, Academic Press, London, 1987, vol. 1, pp. 167–190 and refs. therein.
8. G. H. Robinson, in Coordination Chemistry of Aluminium, ed. G. H. Robinson, VCH, New York, 1993, pp. 57–84 and refs. therein.
9. L. M. Engelhardt, U. Kynast, C. L. Raston and A. H. White, Angew. Chem., 1987, 99, 702; Angew. Chem., Int. Ed. Engl., 1987, 26, 681.
10. M. Niemeyer and P. P. Power, Organometallics, 1995, 14, 5488.
11. D. Rutherford and D. A. Atwood, J. Am. Chem. Soc., 1996, 118, 11 535 and refs. therein.
12. M. D. B. Dillingham, J. B. Hill, B. Lee, S. J. Schauer, W. T. Pennington, G. H. Robinson and D. C. Hrncir, J. Coord. Chem., 1993, 28, 337.
13. P. B. Hitchcock, H. A. Jasim, M. F. Lappert and H. D. Williams, Polyhedron, 1990, 9, 245.
14. H. Chen, R. A. Bartlett, H. V. R. Dias, M. M. Olmstead and P. P. Power, Inorg. Chem., 1991, 30, 2487; R. Boese and U. Klingebiel, J. Organomet. Chem., 1986, 315, C17.
15. K. Ruhlandt-Senge, J. J. Ellison, R. J. Wehmschulte, F. Pauer and P. P. Power, J. Am. Chem. Soc., 1993, 115, 11 353; D. Stalke and K. H. Whitmire, J. Chem. Soc., Chem. Commun., 1990, 833.
16. W. Clegg, Acta Crystallogr., Sect. A, 1983, 39, 158.
17. G. M. Sheldrick, Acta Crystallogr., Sect. A, 1990, 46, 467.
18. G. M. Sheldrick, SHELXL 93, University of Göttingen, 1993.