Modeling of Ni-Fe-Center of Ni-CO-Dehydrogenases by Nickel Complexes with Thiaazaligands

Abstract

Three new nickel(II) complexes with ligands 1,8-bis(2′-pyridyl)-3,6-dithiaoctane (Pdto) and dithiosemicarbazone of 4,7-dithiadecane-2,9-dione (DtdtzH 2) of composition Ni(Pdto)(H 2O) 2(ClO 4) 2, Ni(DtdtzH 2)(Cl0 4) 2 and Ni(Dtdtz) were prepared, their molecular structures, spectral and redox-properties were studied. The possibilities of chemical reduction of Ni(Pdto)(H 2O) 2(ClO 4) 2 to nickel(I) and nickel(0) species and the reaction of nickel(I) complex with CO were shown, which may be described as the modeling of one of the stages of reactions with CO on active Ni-Fe-site of Ni-CO-dehydrogenases. It was found that Ni(DtdtzH 2)(ClO 4) reacted with (Et 4N) 2[Fe 4S 4(SBz) 4] (BzSH = C 6H 5CH 2SH) forming adduct. In the row of studied complexes Ni(Pdto) (H 2O) 2(ClO 4) 2 maybe described as the best structural model of Ni-Fe-site of Ni-CO-dehydrogenases on the redox properties.

Department(s)

Chemistry

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2001 Akademiia Nauk Ukrains'koi Rsr., All rights reserved.

Publication Date

01 Jan 2001

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