Table 6.
Chemical structure of polyoxotungstates
| Compound a | Chemical formula | Species of structure |
|---|---|---|
| PM-43 | K5[SiVW11O40] | Keggin |
| PM-47 | K7[BVW11O40] | Keggin |
| PM-518 | [Et2NH2]7[PTi2W10O40] | Keggin |
| PM-520 | [Pri2NH2]5[PTiW11O40] | Keggin |
| PM-523 | [PriNH3]6[PTi2W10O38(O2)2]H2O | Keggin |
| PM-1001 b | K10Na[(VO)3(SbW9O33)2]26H2O | Keggin sandwich |
| PM-1002 b | K11H[(VO)3(SbW9O33)2]27H2O | Keggin sandwich |
a
PM-518, PM-520, PM-523 possess a Ti atom and PM-43, PM-47, PM-1001 possess a V atom.
b
PM-001 and PM-1002 have the same core structure of (VO)3(SiW9O33)2; however, the V3 of PM-1001 consists of two VIV and one VV while that of PM-1002 consists of three VIV.