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. Author manuscript; available in PMC: 2016 May 19.
Published in final edited form as: Acc Chem Res. 2015 May 5;48(5):1286–1295. doi: 10.1021/acs.accounts.5b00058

Figure 1.

Figure 1

Structures of the active sites of NiFe and FeFe hydrogenases and of vitamin B12 (R = H2O, CN−, CH3, adenosyl…), proton-bridged and difluoroboryl-annulated cobaloximes (L = solvent (H2O, CH3CN, DMF) and cobalt diimine-dioxime complexes 1X2 and 2X2 (X = Br, Cl…)