A Dithiolate-Bridged (CN)2(CO)Fe−Ni Complex Reproducing the IR Bands of [NiFe] Hydrogenase
摘要:
A dithiolate-bridged dinuclear Fe-Ni complex, which has the desired fac-(CN)(2)(CO) ligand set at iron, has been synthesized. Its CN/CO bands in the IR spectrum reproduce those of the Ni-A, Ni-B, and Ni-SU states, which indicate that these octahedral Fell centers have similar electronic properties. This result verifies the assignment of a (CN)(2)(CO)Fe-II moiety in the active site of [NiFe] hydrogenase.
Dithiolato-Bridged Dinuclear Iron−Nickel Complexes [Fe(CO)<sub>2</sub>(CN)<sub>2</sub>(μ-SCH<sub>2</sub>CH<sub>2</sub>CH<sub>2</sub>S)Ni(S<sub>2</sub>CNR<sub>2</sub>)]<sup>-</sup> Modeling the Active Site of [NiFe] Hydrogenase
作者:Zilong Li、Yasuhiro Ohki、Kazuyuki Tatsumi
DOI:10.1021/ja051590+
日期:2005.6.1
[NiFe] hydrogenase, the enzyme of which catalyzes the reversible oxidation of molecular hydrogen to protons and electrons, contains a unique heterodinuclear thiolate-bridged Ni-Fe complex in which the iron center is coordinated by CO and CN. We have synthesized dithiolate-bridged Ni-Fe complexes bearing CO and CN ligands to model the active center of [NiFe] hydrogenase. The Ni-Fe complexes containing