Transition metal oxalate complex

Transition metal oxalate complexes are coordination complexes with oxalate (C2O42−) ligands. Some are useful commercially, but the topic has attracted regular scholarly scrutiny. Oxalate (C2O42-) is a kind of dicarboxylate ligand. As a small, symmetrical dinegative ion, oxalate commonly forms five-membered MO2C2 chelate rings. Mixed ligand complexes are known, e.g., [Co(C2O4)(NH3)4]κ+.

Structures of some metal oxalate complexes
  • [Cr2(ox)5]4-.
  • Potassium ferrioxalate (K3[Fe(C2O4)3]·3H2O)
  • Oxaliplatin, an anticancer drug
  • [Zr(ox)4]4-
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