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http://nopr.niscpr.res.in/handle/123456789/41775| Title: | Molybdate-hydroxylamine reaction: Synthesis, characterisation and electrochemistry of Mo(NO) , Mo(NO)2+ and Mo(NO)(NH2O)2+ chelates with 8-quinolinol |
| Authors: | Bhattacharyya, Ramgopal Ghosh, Swapna |
| Issue Date: | Jan-1991 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The reaction of MoO and NH2 OH.HCl with 8-quinolinol (QOH) gives an orange yellow solid from which complexes [Mo(NO)2(QO)2] (1), [MoO2(QO)2] (2), [Mo(NO)2(QO)2] (3) and [Mo(NO)2(QO)2] (4) are obtained on repeated solvent extraction followed by column chromatography. The complex [Mo(NO)2(QO)2] contains two magnetically non-equivalent QO ligands in a seven coordinate pentagonal bipyramidal arrangement. The complex [Mo(NO)(QO)2] is paramagnetic, showing axially symmetric EPR signals (g⊥ =2.02, gll=2.00) and super hyperfine splitting (S H F S), caused by the 15N of the equatorial and equivalent QO ligands. The electronic spectrum of the chelate also supports the suggested gross structure. The compound [Mo(NO)2(QO)2] shows a stepwise two-electron reduction of the Mo(NO) moiety but the reverse oxidation occurs in a single step, the cyclic response being pseudo-reversible with respect to the first reduction wave. Interestingly, [Mo(NO)2(QO)2] under aerobic conditions, induces electropolymerisation causing the deposition of a conducting polymer [poly-8-quinolinol, as evidenced by IR spectral data], on the working platinum foil electrode. |
| Page(s): | 35-40 |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Appears in Collections: | IJC-A Vol.30A(01) [January 1991] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCA 30A(1) 34-40.pdf | 1.57 MB | Adobe PDF | View/Open |
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