Abstract
The title compound, bis(tetraphenylphosphonium) μ-oxalato-O 1 ,O 2 :O 1' ,O 2' -bis[aqua(oxalato-O 1 ,O 2 )oxovanadium(IV)] octahydrate, [(C 6 H 5 ) 4 P] 2 [V 2 O 2 (C 2 O 4 ) 3 (H 2 O) 2 ].8H 2 O, consists of an anionic vanadyl dimer linked by an oxalate ligand and additionally coordinated by two non-bridging oxalate and two water molecules. Both the bridging and non-bridging oxalates act as bidenate chelating ligands, forming five-membered rings with the metal centres. The V IV atoms are six-coordinated, forming a distorted octahedral geometry. A two-dimensional O-H...O hydrogen-bonding network of water molecules and oxalate O atoms stabilizes the structure.
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