Syntheses, spectroscopies and structures of molybdenum(VI) complexes with homocitrate
Chow, Yuan L.
- 化学化工－已发表论文 
Initial investigations into the possible role of homocitric acid in iron molybdenum cofactor (FeMo-co) of nitrogenase lead us to isolate and characterize two tetrameric molybdate( VI) species. The complexes K-2(NH4)(2)[(MoO2)(4)O-3(R, S-Hhomocit)(2)]center dot 6H(2)O (1) and K-5[(MoO2)(4)O-3(R, S-Hhomocit)(2)]Cl center dot 5H(2)O (2) (homocitric acid = H(4)homocit, C7H10O7) are prepared from the reactions of acyclic homocitric acid and molybdates, which represent the first synthetic structural examples of molybdenum homocitrate complexes. The homocitrate ligand trapped by tetranuclear molybdate coordinates to the molybdenum(VI) atom through alpha-alkoxy and alpha-, beta-carboxy groups. The physical properties, structural parameters, and their possible biological relevances are discussed.