Polyoxoanions functionalized by diorganotin groups: the tetrameric, chiral tungstoarsenate(III), [{Sn(CH3)2 (H2O)}2{Sn(CH3)2}As3((alpha)-AsW9O33)4]^21–

The tetrameric, hybrid organic–inorganic tungstoarsenate(III) [{Sn(CH3)2(H2O)}2{Sn(CH3)2}As3((alpha)-AsW9O33)4]^21– (1) is composed of four (B-(alpha)-AsW9O33) fragments that are linked by three dimethyltin groups and three As(III) atoms resulting in an unprecedented, chiral polyoxoanion assembly with C1 symmetry.