Complexes of cis-dioxomolybdenum(VI) and oxovanadium(IV) with a tridentate ONS donor ligand : synthesis, spectroscopic properties, X-ray crystal structure and catalytic activity
Copyright © 2014 Elsevier B.V. All rights reserved..
New cis-dioxomolybdenum(VI) and oxovanadium(IV) complexes of the Schiff base, derived from S-methyl dithiocarbazate and 2,3-dihydroxybenzaldehyde (H2dhsm), have been synthesized. The complexes of the type cis-[MoO2(dhsm)] (1a), cis-[MoO2(dhsm)(D)] (1b-1d) [D=neutral monodentate ligand; EtOH, pyridine (py) or imidazole (imz)], [VO(dhsm)(NN)] (2a, 2b) [NN=2,2'-bipyridine (bipy) or 1,10-phenanthroline (phen)] and [VO(dhsm)] (2c) have been isolated, characterized by (1)H NMR, IR, UV-Vis and EPR spectral studies and investigated by cyclic voltammetry. The X-ray crystal structure of cis-[MoO2(dhsm)(EtOH)] (1b) has been determined and shows that the complex has a distorted octahedral geometry in which the H2dhsm behaves as a dianionic ONS tridentate ligand coordinating via phenoxide oxygen, hydrazinic nitrogen and thiolate sulfur. The oxomolybdenum(IV) complex [MoO(dhsm)] (1e) has obtained from dioxomolybdenum(VI) complex (1b) by oxo abstraction with PPh3. The reactivity of the complexes toward catalytic oxidation of alcohols in the presence of H2O2 and t-BuOOH as co-oxidants under solvent free conditions is reported.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2014 |
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| Erschienen: |
2014 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:129 |
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| Enthalten in: |
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy - 129(2014) vom: 14. Aug., Seite 293-302 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Fayed, Ahmed M [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Completed 09.01.2015 Date Revised 27.05.2014 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.saa.2014.03.064 |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM237511797 |
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| 100 | 1 | |a Fayed, Ahmed M |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Complexes of cis-dioxomolybdenum(VI) and oxovanadium(IV) with a tridentate ONS donor ligand |b synthesis, spectroscopic properties, X-ray crystal structure and catalytic activity |
| 264 | 1 | |c 2014 | |
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| 500 | |a Date Completed 09.01.2015 | ||
| 500 | |a Date Revised 27.05.2014 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Copyright © 2014 Elsevier B.V. All rights reserved. | ||
| 520 | |a New cis-dioxomolybdenum(VI) and oxovanadium(IV) complexes of the Schiff base, derived from S-methyl dithiocarbazate and 2,3-dihydroxybenzaldehyde (H2dhsm), have been synthesized. The complexes of the type cis-[MoO2(dhsm)] (1a), cis-[MoO2(dhsm)(D)] (1b-1d) [D=neutral monodentate ligand; EtOH, pyridine (py) or imidazole (imz)], [VO(dhsm)(NN)] (2a, 2b) [NN=2,2'-bipyridine (bipy) or 1,10-phenanthroline (phen)] and [VO(dhsm)] (2c) have been isolated, characterized by (1)H NMR, IR, UV-Vis and EPR spectral studies and investigated by cyclic voltammetry. The X-ray crystal structure of cis-[MoO2(dhsm)(EtOH)] (1b) has been determined and shows that the complex has a distorted octahedral geometry in which the H2dhsm behaves as a dianionic ONS tridentate ligand coordinating via phenoxide oxygen, hydrazinic nitrogen and thiolate sulfur. The oxomolybdenum(IV) complex [MoO(dhsm)] (1e) has obtained from dioxomolybdenum(VI) complex (1b) by oxo abstraction with PPh3. The reactivity of the complexes toward catalytic oxidation of alcohols in the presence of H2O2 and t-BuOOH as co-oxidants under solvent free conditions is reported | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 4 | |a Catalytic oxidations | |
| 650 | 4 | |a Dioxomolybdenum(VI) complexes | |
| 650 | 4 | |a ONS-donor ligand | |
| 650 | 4 | |a Oxovanadium(IV) complexes | |
| 650 | 4 | |a X-ray crystal structure | |
| 650 | 7 | |a Benzaldehydes |2 NLM | |
| 650 | 7 | |a Catechols |2 NLM | |
| 650 | 7 | |a Coordination Complexes |2 NLM | |
| 650 | 7 | |a Imidazoles |2 NLM | |
| 650 | 7 | |a Ligands |2 NLM | |
| 650 | 7 | |a Oxidants |2 NLM | |
| 650 | 7 | |a Oxides |2 NLM | |
| 650 | 7 | |a Phenanthrolines |2 NLM | |
| 650 | 7 | |a Pyridines |2 NLM | |
| 650 | 7 | |a Schiff Bases |2 NLM | |
| 650 | 7 | |a molybdenum dioxide |2 NLM | |
| 650 | 7 | |a oxovanadium IV |2 NLM | |
| 650 | 7 | |a 20644-97-7 |2 NLM | |
| 650 | 7 | |a 2,3-dihydroxybenzaldehyde |2 NLM | |
| 650 | 7 | |a 24677-78-9 |2 NLM | |
| 650 | 7 | |a Vanadates |2 NLM | |
| 650 | 7 | |a 3WHH0066W5 |2 NLM | |
| 650 | 7 | |a 2,2'-Dipyridyl |2 NLM | |
| 650 | 7 | |a 551W113ZEP |2 NLM | |
| 650 | 7 | |a imidazole |2 NLM | |
| 650 | 7 | |a 7GBN705NH1 |2 NLM | |
| 650 | 7 | |a Molybdenum |2 NLM | |
| 650 | 7 | |a 81AH48963U |2 NLM | |
| 650 | 7 | |a pyridine |2 NLM | |
| 650 | 7 | |a NH9L3PP67S |2 NLM | |
| 650 | 7 | |a 1,10-phenanthroline |2 NLM | |
| 650 | 7 | |a W4X6ZO7939 |2 NLM | |
| 700 | 1 | |a Elsayed, Shadia A |e verfasserin |4 aut | |
| 700 | 1 | |a El-Hendawy, Ahmed M |e verfasserin |4 aut | |
| 700 | 1 | |a Mostafa, Mohamed R |e verfasserin |4 aut | |
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