Transformation from [W6O19]2− to [W6O22]8− stabilized by Cu(ii) complexation†
Abstract
A rare [W6O22]8− fragment has been first captured in aqueous solution of [W6O19]2− by using a transition-metal complex and isolated as a new compound [Cu4(W6O22)(L1)2(H2O)2]·2H2O (1; L1 =