Homonuclear dinickel complexes: structural mimics for the dinickel subsite of the A-cluster of acetyl-CoA synthase
摘要:
[Ni(ema)(p-S,S')Ni(dppp)] (1) and [Ni(ema)(mu-S,S')Ni(dppe)] (2) have been prepared as synthetic structural analogues of the Ni-Ni subsite of the A-cluster of the enzyme acetyl-CoA synthase by reaction of [Ni(ema)](2-), H(4)ema is N,N'-ethylenebis(2-mercaptoacetamide), with [NiCl2(diphos)], diphos is 1,2-bis(diphenylphosphino)propane (dppp) or 1,2-bis(diphenylphosphino)ethane (dppe). A similar reaction with 1,2-bis(diethylphosphino)ethane did not give the dinuclear product but the trinuclear complex [NEt4](2)[Ni {Ni(ema)(mu-S,S')}(2)] (3). Complexes 1 and 3 have been crystallographically characterised. (C) 2004 Elsevier B.V. All rights reserved.