Poly(imidazolyliden-yl)borato Complexes of Tungsten: Mapping Steric vs. Electronic Features of Facially Coordinating Ligands.

ABSTRACT: A convenient synthesis of [HB(HImMe)₃](PF₆)₂ (ImMe = N-methylimidazolyl) is decribed. This salt serves in situ as a precursor to the tris(imidazolylidenyl)borate Li[HB(ImMe)₃] pro-ligand upon deprotonation with ⁿBuLi. Reaction with [W(≡CC₆H₄Me-4)(CO)₂(pic)₂(Br)] (pic = 4-picoline) affords the carbyne complex [W(≡CC₆H₄Me-4)(CO)₂{HB(ImMe)₃}]. 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_CO) properties. The reaction of [W(≡CC₆H₄Me-4)(CO)₂

SUBMITTER: Inglis CM 

PROVIDER: S-EPMC10798377 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature