Preparation, characteristics and crystal structures of novel N-heterocyclic carbene substituted furan- and pyridine-containing azadithiolate Fe-S complexes
2007 (English)In: Polyhedron, ISSN 0277-5387, Vol. 26, no 7, 1499-1504 p.Article in journal (Refereed) Published
Two novel N-heterocyclic carbene disubstituted furan- and pyridine-containing azadithiolate Fe-only hydrogenase models (2 and 4) have been synthesized, and characterized by IR and H-1 NMR spectra and X-ray single crystal diffraction. Cyclic voltammetry (CV) experiments indicate that they show more negative reductive potentials at -2.53 V and -2.49 V, respectively versus the ferrocene/ferrocenium couple (Fc/Fc(+)) and are easier to capture proton attributing to the strong electron-donating ligand NHC. After the protonation under F3CCO2H the reductive potentials of 2 and 4 have 1.02 V and 0.77 V shifts, indicating the formation of Fe-H-Fe bond. The results also are confirmed by the data changes in IR spectra and the negative H signals are detected by 1H NMR spectra at -27 ppm and -55 ppm.
Place, publisher, year, edition, pages
2007. Vol. 26, no 7, 1499-1504 p.
Fe-only hydrogenase, furan, pyridine, NHC, proton reductive potential, iron-sulfur complex
IdentifiersURN: urn:nbn:se:kth:diva-37043DOI: 10.1016/j.poly.2006.11.033ISI: 000246424300018ScopusID: 2-s2.0-34147166594OAI: oai:DiVA.org:kth-37043DiVA: diva2:431898