Syntheses, spectroscopies and structures of molybdenum(VI) complexes with homocitrate.

Zhao-Hui Zhou, Shu-Ya Hou, Ze-Xing Cao, Khi-Rui Tsai, Yuan L Chow

Department of Chemistry, College of Chemistry and Chemical Engineering and State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, China. zhzhou@xmu.edu.cn

Inorganic chemistry 2006 Oct 2

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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 K2(NH4)2[(MoO2)4O3(R,S-Hhomocit)2].6H2O (1) and K5[(MoO2)4O3(R,S-Hhomocit)2]Cl.5H2O (2) (homocitric acid = H4homocit, 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.

Citation

Zhao-Hui Zhou, Shu-Ya Hou, Ze-Xing Cao, Khi-Rui Tsai, Yuan L Chow. Syntheses, spectroscopies and structures of molybdenum(VI) complexes with homocitrate. Inorganic chemistry. 2006 Oct 2;45(20):8447-51