The reaction of [W(![[triple bond, length as m-dash]](https://www.rsc.org/images/entities/char_e002.gif)
CH)Br(CO)2(dcpe)] (dcpe = 1,2-bis(dicyclohexylphosphino)ethane) with tBuLi and SiCl4 affords the trichlorosilyl ligated neopentylidyne complex [W(CtBu)(SiCl3)(CO)2(dcpe)]. This slowly reacts with H2O to afford [W(CCH2tBu)Cl3(dcpe)] and ultimately H2C![[double bond, length as m-dash]](https://www.rsc.org/images/entities/char_e001.gif)
CHtBu via an unprecedented alkylidyne homologation in which coordinated CO is the source of the additional carbon atom with potential relevance to the Fischer–Tropsch process.
Y. Han, A. F. Hill and R. Y. Kong, Chem. Commun., 2018, 54, 2292 DOI: 10.1039/C8CC00119G
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