Sulfatovanadium complexes

The presence of vanadium(III) complexes in the very acidic medium of the vacuoles of the signet ring cells in Ascidia ceratodes, containing one or two sulfato/hydrogensulfato ligands, has focused interest on sulfatovanadium complexes as model systems. " ] Whereas readily forms a 1 1 complex with sulfate K = 300 m ), the affinity of V to sulfate is less pronounced. Selected stability constants and pA a values obtained from... 

Examples of structurally characterised sulfatovanadium complexes with and without co-ligands, exemplifying different coordination modes of sulfate. See refs 24, 26 and 27. 

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