Crystal-structure of NA3(NH4)12[MO57FE6(NO)6O174(OH)3(H2O)24] · 76H2O, a Compound with an Unique Clusteranion

Müller A, Plass W, Krickemeyer E, et al. Kristallstruktur von Na3(NH4)12[Mo57Fe6(NO)6O174(OH)3(H2O)24] · 76H2O, einer Verbindung mit einem ungewöhnlichen Clusteranion. Monatshefte für Chemie. 1994;125(5):525-533.The X-ray crystal structure of the compound Na3(NH4)12[Mo57Fe6(NO)6O174(OH)3(H2O)24].76H2O (3) [P6(3)/mmc; a = 2380.6(5), c = 2763.497), Z = 2], the giant cluster anion of which has the shape of a doughnut, shows remarkable details: The cluster [{Fe(H2O)2}6{Mo(mu-H2O)2(mu-OH)Mo}3{Mo15(MoNO)23+O58(H2O)2}3]15-can be described as being composed of three transferable {Mo17} ligands bridged by cationic centers and contains a novel nanodimensional central cavity