Heteropolyanions containing two different heteroatoms—I

Structure of a novel type of heteropolyanion: dicupro(II)-18-molybdodisilicate(12–), [Cu2Si2Mo18O66]12−

“…Eriks, Pope, Shibata, Rollins, Fang & Koh, 1966;Weakley & Malik, 1967;Tourn6 & Tourn6, 1969;Tourn6, Tourn6, Malik & Weakley, 1970;Zonnevijlle, 1976). The [H2X~ + Yn+M~7062](2°-2m-n)--type anions (xm+ = ps+ or ASS+; M = Mo 6+ or W6+; yn+ = transition metals) (Malik & Weakley, 1968) can be regarded as substitution derivatives of the well known…”

Lacunary-Substituted Undecatungstosilicates Sensitize Methicillin-Resistant Staphylococcus aureus to .BETA.-Lactams.

“…13) This neutralized solution was filtered once, and the filtrate was kept at 4°C for a few days to allow a white powder to sediment. The precipitate was recovered by filtering, and then dissolved in hot water and recrystallized twice.…”

A Novel Inorganic‐Organic Composite Constructed from Cobalt(II)‐Monosubstituted Polyoxometalates and Poly(amidoamine)‐NH2 Dendrimers

“…There was weaker absorption in the range of 500-700 nm ( Figure 5B). The main feature of PW 11 Co (Figure 5B-a) is a 4 T 1g (P)← 4 T 1g (F) transition for octahedral Co II with six oxygen bound ligand around 550 nm. 19 As shown in Figure 5B-b, the displacement of coordinated water by the terminal -NH 2 of PAMAM resulted in decline of the symmetry of the Co II octahedral coordination and a subsequent splitting of the 4 T 1g (P) band into E g and A 2g components.…”

“…2,3 An important subclass of POM clusters is lacunary POM, which misses one or more addenda atoms (W, Mo). Unsaturated POM can bind several different transition metals 4,5 to form transition-metal-substituted polyoxometalates (TMSP). The Keggin anion [Co II (H 2 O)PW 11 O 39 ] 5- (Figure 1) is an example of the monosubstituted polyoxometalates, in which the transition metal Co(II) was coordinated by five formal O atoms of [PW 11 O 39 ] 11-while the last coordinate site was occupied by H 2 O.…”