Trisubstituted heteropolytungstates as soluble metal oxide analogues. 4. The synthesis and characterization of organic solvent-soluble (Bu4N)12H4P4W30Nb6O123 and (Bu4N)9P2W15Nb3O62 and solution spectroscopic and other evidence for the supported organometallic derivatives (Bu4N)7[(C5Me5)Rh.cntdot.P2W15Nb3O62] and (Bu4N)7[(C6H6)Ru.cntdot.P2W15Nb3O62]

Exploring Wells-Dawson Clusters Associated With the Small Ribosomal Subunit

“…Another common method of dimerization is through coordination of organometallic ligands which can react to form larger structures (Nomiya et al, 2001). Most of the organometallic complexes are covalently bound to three of the bridging oxygen atoms in a cap of the cluster unit documenting the need for the complex coordination (Edlund et al, 1988; Pohl et al, 1995; Nagata et al, 1997; Nomiya et al, 2007). The Wells-Dawson clusters and derivatives are very versatile and are known to form dimeric/polymeric structures with strong covalent bonds and interactions as hydrogen bond ones.…”

Synthesis, structure, and photocatalytic hydrogen evolution of a trimeric Nb/W addendum cluster

“…15 Recently, some other Nb/W addendum heteropolyoxometalate clusters have been communicated. However, most of them comprise a monomeric, [16][17][18][19][20][21][22][23] dimeric 18,[24][25][26][27] or tetrameric 18,19,[27][28][29] structure. Key efforts include the synthesis and physical characterization of the above-mentioned Keggin-type monomeric triniobium-substituted polytungstosilicate [SiW 9 Nb 3 O 40 ] 7À and its dimeric form [Si 2 W 18 Nb 6 O 77 ] 8À by Finke et al 15 and the extensive efforts with the preparation and single-crystal X-ray structure of the Keggin-type monomeric triperoxoniobiumsubstituted clusters [XW 9 (NbO 2 ) 3 O 37 ] 7À (X ¼ P, 16 Si, 17 Ge, 18 As 19 ) and its peroxo-free clusters [XW 9 Nb 3 O 40 ] 7À (X ¼ Si, 15 33 It should be noted that our group has developed a new synthetic strategy, utilizing peroxo-niobium-substituted POM formed in situ as a secondary building block, to construct giant Nb/W addendum polyoxoanions and their transition-metal derivatives in recent years.…”

Organoruthenium‐Containing Heteropoly‐23‐Tungstate Family [{Ru(L)}2(α‐XW11O39)2WO2]m– (L = benzene, p‐cymene; X = GeIV, SiIV, m = 10; BIII, m = 12)

“…The first example of a {Ru(arene)} 2+ ‐containing POM was [Ru(C 6 H 6 )P 2 W 15 Nb 3 O 62 ] 7– , reported by Finke and co‐workers in 1988 9. Nowadays, this class of polyanions comprises numerous other examples including [{Ru(C 6 H 6 )(H 2 O)}{Ru(C 6 H 6 )}(γ‐XW 10 O 36 )] 4– (X = Ge IV , Si IV ), which was prepared by reacting [Ru(C 6 H 6 )Cl 2 ] 2 with [γ‐XW 10 O 36 ] 8– (X = Ge IV , Si IV ) 10.…”