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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | El-Hendawy, Ahmed M. Elsayed, Shadia A. Fayed, Ahmed M. Mostafa, Mohamed R. |
| Description | Country affiliation: Egypt Author Affiliation: Fayed AM ( Department of Chemistry, Faculty of Science, Damietta University, Damietta, Egypt.); Elsayed SA ( Department of Chemistry, Faculty of Science, Damietta University, Damietta, Egypt.); El-Hendawy AM ( Department of Chemistry, Faculty of Science, Damietta University, Damietta, Egypt. Electronic address: amelhendawy@yahoo.com.); Mostafa MR ( Department of Chemistry, Faculty of Science, Damietta University, Damietta, Egypt.) |
| Abstract | 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. |
| ISSN | 13861425 |
| Volume Number | 129 |
| e-ISSN | 18733557 |
| Journal | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2014-08-14 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Coordination Complexes Chemistry Molybdenum Oxidants Oxides Vanadates 2,2'-dipyridyl Chemical Synthesis Benzaldehydes Catalysis Catechols Crystallography, X-ray Imidazoles Ligands Models, Molecular Oxidation-reduction Phenanthrolines Pyridines Schiff Bases Spectrum Analysis Journal Article Research Support, Non-u.s. Gov't Discipline Spectroscopy |
| Content Type | Text |
| Resource Type | Article |
| Subject | Spectroscopy Atomic and Molecular Physics, and Optics Analytical Chemistry Instrumentation |
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