The bridged structures, HSi(µ-F)2SiH and FSi(µ-H)2SiF are minima on the Si2H2F2 potential energy surface and are less than 10 kcal mol–1 higher in energy than the classical disilene, HFSi![[double bond, length half m-dash]](https://www.rsc.org/images/entities/char_e006.gif)
SiHF (MP3/6-31G*//6-31 G*), suggesting that the species observed recently by Jutzi et al. at low temperature by 29Si NMR is the bridged (C5Me5)Si(µ-F)2Si(C5Me5) rather than the suggested F(C5Me5)SiSi(C5Me5)F.
J. Maxka and Y. Apeloig, J. Chem. Soc., Chem. Commun., 1990, 737 DOI: 10.1039/C39900000737
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