Summary
The adducts of methylenetriphenylphosphine with hexacarbonyltungsten have been studied by1H and13C n.m.r. spectroscopy. The methyl, (CO)5WC(OMe)CHPPh3, and trifluoromethanesulphonate, (CO)5WC(OSO2CF3)CHPPh3, derivatives have been prepared and an attempt has been made to prepare the acetylenic complex,\((CO)_5 \bar WC \equiv C\mathop P\limits^ + Ph_3 \) from these adducts.
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Species (2) has been previously characterized. Even though product (1) is isolated, it is not uncommon to observe deprotonation of the phosphonium cation\(Ph_3 \mathop P\limits^ + Me\) by ylides;c.f.: H. J. Bestmann, H. S. Liberda and J. P. Snyder,J. Am. Chem. Soc.,90, 2963 (1968).
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R. Köster, D. Simic and M. A. Grossberger,Justus Liebigs Ann. Chem., 739, 211 (1970).
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Kaska, W.C., Creaser, C.S. Carbon-13 and proton magnetic resonance spectra of hexacarbonyltungsten methylenetriphenylphosphorane adducts. Transition Met Chem 3, 360–362 (1978). https://doi.org/10.1007/BF01393591
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DOI: https://doi.org/10.1007/BF01393591