A convenient synthesis of [HB(HImMe)](PF) (ImMe = -methylimidazolyl) is decribed. This salt serves in situ as a precursor to the tris(imidazolylidenyl)borate Li[HB(ImMe)] pro-ligand upon deprotonation with BuLi. Reaction with [W(≡CCHMe-4)(CO)(pic)(Br)] (pic = 4-picoline) affords the carbyne complex [W(≡CCHMe-4)(CO){HB(ImMe)}]. Interrogation of experimental and computational data for this compound allow a ranking of familiar tripodal and facially coordinating ligands according to steric (percentage buried volume) and electronic (ν) properties. The reaction of [W(≡CCHMe-4)(CO){HB(ImMe)}] with [AuCl(SMe)] affords the heterobimetallic semi-bridging carbyne complex [WAu(μ-CCHMe-4)(CO)(Cl){HB(ImMe)}].
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| http://dx.doi.org/10.3390/molecules28237761 | DOI Listing |
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