Dinuclear vanadium and tetranuclear iron complexes obtained with the open Wells–Dawson [Si2W18O66]16– tungstosilicate

Abstract

Abstract Reaction of two transition metal cations M (M = V V , Fe III ) on the open Wells–Dawson anion α-[{K(H 2 O) 2 }Si 2 W 18 O 66 ] 15– leads to dinuclear and tetranuclear complexes, respectively. The molecular anions [{KV 2 O 3 (H 2 O) 2 }(Si 2 W 18 O 66 )] 11– and [{Fe 4 (OH) 6 }(Si 2 W 18 O 66 )] 10– have been structurally characterized by single crystal X-ray diffraction. The oxo/hydroxometallic clusters [KV 2 O 3 (H 2 O) 2 ] 5+ and [Fe 4 (OH) 6 ] 6+ are included in the pocket between the two subunits of [Si 2 W 18 O 66 ] 16– . The Fe III atoms of the iron complex can be reduced to Fe II by a single four-electron step. To cite this article: N. Leclerc-Laronze et al., C. R. Chimie 9 (2006) .