Molybdenum imidazole citrate and bipyridine homocitrate in different oxidation states – balance between coordinated α-hydroxy and α-alkoxy groups

Abstract

Oxo and thiomolybdenum(iv/vi) citrates, molybdenum(v) homocitrate and molybdenum(vi) citrate were obtained, showing the influence of coordinated α-hydroxy and α-alkoxy groups with different oxidation states.

Isolated Mixed-Valence Iron Vanadium Malate and Its Metal Hydrates (M = Fe2+, Cu2+, Zn2+) with Reversible and Irreversible Adsorptions for Oxygen

“…Their structural, electronic, and electrochemical properties were investigated in depth. In addition, the homocitrate in nitrogenase is another research focus − which has been widely modeled by metal homocitrato homologues. − In this report, we have used malic acid, a homologue of homocitrate, as an auxiliary ligand to obtain the isolated octanuclear Fe 2 V 6 cluster (NH 4 ) 3 (NH 3 CH 3 ) 3 [Fe III 2 V IV/V 6 O 11 (mal) 6 ]·7.5H 2 O ( 1 ). Its skeleton shows some similarity to the configuration of the FeV-cofactor in vanadium nitrogenase.…”

Assignment of protonated R-homocitrate in extracted FeMo-cofactor of nitrogenase via vibrational circular dichroism spectroscopy

“…Most reported homocitrate and its homologues bind to molybdenum via α-alkoxy, α-carboxy, and/or β-carboxy groups 11,[31][32][33][34][35][36][37][38][39][40][41] . Several molybdenum α-hydroxycarboxylates were isolated coordinating via α-hydroxy (protonated) and α-carboxy groups 31,42,43 . Less concern is on molybdenum complexes with αhydroxycarboxylate and imidazole-like ligand simultaneously.…”