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Science 4 September 1998:
Vol. 281. no. 5382, pp. 1500 - 1501
DOI: 10.1126/science.281.5382.1500
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Reports

Low-Temperature Synthesis of Zintl Compounds with a Single-Source Molecular Precursor

Michael A. Beswick, * Nick Choi, Christopher N. Harmer, Alexander D. Hopkins, Mary McPartlin, Dominic S. Wright *

Thermolysis of the heterobimetallic phosphinidene complex {[Sb(PCy)3]2- Li6·6HNMe2} (Cy = C6H11) at 303 to 313 kelvin gives Zintl compounds containing (Sb7)3- anions. The complex thus constitutes a stable molecular single-source precursor to Zintl compounds and provides a potential low-temperature route to photoactive alkali metal antimonates. The new chemical reaction involved, which is driven thermodynamically by the formation of P-P bonds, has implications in the low-temperature synthesis of other technologically important materials (such as gallium arsenide).

M. A. Beswick, C. N. Harmer, A. D. Hopkins, D. S. Wright, Department of Chemistry, Lensfield Road, Cambridge CB2 1EW, UK. N. Choi and M. McPartlin, School of Chemistry, University of North London, London N7 8DB, UK.
*   To whom correspondence should be addressed. E-mail: dsw1000{at}cus.cam.ac.uk

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Science. ISSN 0036-8075 (print), 1095-9203 (online)