Journal
INORGANICA CHIMICA ACTA
Volume 373, Issue 1, Pages 54-61Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.ica.2011.03.052
Keywords
X-ray crystal structure; Nickel complex; N and S containing ligand
Categories
Funding
- US Department of Education
- NSF [CHE-0113972]
- National Center for Research Resources - NIH [P20 RR017708]
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Nickel Superoxide Dismutase (NiSOD) and the A-cluster of Carbon Monoxide Dehydrogenase/Acetyl Coenzyme A Synthase (CODH/ACS) both feature active sites with Ni coordinated by thiolate and amide donors. It is likely that the particular set of donors is important in tuning the redox potential of the Ni center(s). We report herein an expansion of our efforts involving the use of 2,2'-dithiodibenzaldehyde (DTDB) as a synthon for metal-thiolate complexes to reactions with Ni complexes of N,N-dimethylethylenediamine (dmen). In the presence of coordinating counterions, these reactions result in monomeric square-planar complexes of the tridentate N2S donor ligand derived from the Schiff-base condensation of dmen and DTDB. In the absence of a coordinating counterion, we have isolated a Ni(II) complex with an asymmetric N2S2 donor set involving one amine and one imine N donor in addition to two thiolate donors. This latter complex is discussed with respect to its relevance to the active site of NiSOD. (C) 2011 Elsevier B. V. All rights reserved.
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