Protonation and Non-Innocent Ligand Behavior in Pyranopterin Dithiolene Molybdenum Complexes.

ABSTRACT: The complex [TEA][Tp*Mo^IV(O)(S₂BMOPP)] (1) [TEA = tetraethylammonium, Tp* = tris(3,5-dimethylpyrazolyl)hydroborate, and BMOPP = 6-(3-butynyl-2-methyl-2-ol)-2-pivaloyl pterin] is a structural analogue of the molybdenum cofactor common to all pyranopterin molybdenum enzymes because it possesses a pyranopterin-ene-1,2-dithiolate ligand (S₂BMOPP) that exists primarily in the ring-closed pyrano structure as a resonance hybrid of ene-dithiolate and thione-thiolate forms. Compound 1, the protonated [Tp*Mo^IV(O)(S₂BMOPP-H)] (1-H) and one-electron-oxidized [Tp*Mo^V(O)(S₂BMOPP)] [1-Mo(5+)] species have been studied using a combination of electrochemistry, electronic absorption, and electron paramag

SUBMITTER: Gates C 

PROVIDER: S-EPMC10544801 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature