Triptycene-based Bis(benzimidazole) Carboxylate-Bridged Biomimetic Diiron(II) Complexes.

ABSTRACT: A triptycene-based bis(benzimidazole) ester ligand, L3, was designed to enhance the electron donating ability of the heterocyclic nitrogen atoms relative to those of the first generation bis(benzoxazole) analogs, L1 and L2. A convergent synthesis of L3 was designed and executed. Three-component titration experiments using UV-visible spectroscopy revealed that the desired diiron(II) complex could be obtained with a 1:2:1 ratio of L3:Fe(OTf)₂(MeCN)₂:external carboxylate reactants. X-ray crystallographic studies of two diiron complexes derived in this manner from L3 revealed their formulas to be [Fe₂L3(μ-OH)(μ-O₂CR)(OTf)₂], where R = 2,6-bis(p-tolyl)benzoate (7) or triphenylac

SUBMITTER: Li Y 

PROVIDER: S-EPMC3625018 | biostudies-literature | 2013 Apr

REPOSITORIES: biostudies-literature