Nature 314, 231 - 235 (21 March 1985); doi:10.1038/314231a0

Study of magnetism in osmium cluster compounds as molecular models for small metallic particles

D. C. Johnson^*, R. E. Benfield^†, P. P. Edwards^‡§, W. J. H. Nelson^‡ & M. D. Vargas^‡

^*Baker Laboratory of Chemistry, Cornell University, Ithaca, New York 14853, USA
^†Chemical Laboratory, University of Kent, Canterbury CT2 7NH, UK
^‡University Chemical Laboratory, Lensfield Road, Cambridge CB2 1EW, UK
^§To whom correspondence should be addressed.

The magnetic susceptibilities of a series of cluster carbonyl compounds of osmium have been measured by a high-sensitivity Faraday method and the evolution of certain aspects of 'metallic' behaviour in the high-nuclearity clusters is revealed by a steady increase in the excess molecular susceptibility as the cluster size increases. We also consider here 'metallic' status in the cluster compounds of other transition elements.

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