References

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E. M. Snyder, S. A. Buzza, and A. W. Castleman, Jr. Department of Chemistry, The

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B. Ivlev Department of Physics and Astronomy and NanoCenter University of South Carolina, Columbia, SC

Donald G. Fleming, Randall J. Mikula,” and David M. Garner Dept. of Chemistry and TRIVMF\

Setsuo Ichimarua) Department of Physics, University of Tokyo, Hongo, Tokyo 113, Japan Hikaru Kitamurab) Institute

Eva Zurek, Peter P. Edwards, and Roald Hoffmann* Angewandte Chemie Keywords: ammonia · lithium ·

M. Rambaut 57H rue De La Hacquiniere, 91440 Bures-sur- Yvette, France Received 12 September 1991;