The first metallabenzene,[O[graphic omitted]H)(CO)(PPh3)2] has been prepared from [Os(Co)(CS)(PPh3)3] and ethyen; X- ray crystal structure determination reveals a planar six-membered ring with no significant alternation of C–C bond lengths thus supporting the idea of electron delocalization within the ring.
G. P. Elliott, W. R. Roper and J. M. Waters, J. Chem. Soc., Chem. Commun., 1982, 811 DOI: 10.1039/C39820000811
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