dc.contributor.author | Constantinides, Christos P. | en |
dc.contributor.author | Koutentis, Panayiotis Andreas | en |
dc.contributor.author | Krassos, H. | en |
dc.contributor.author | Rawson, J. M. | en |
dc.contributor.author | Tasiopoulos, Anastasios J. | en |
dc.creator | Constantinides, Christos P. | en |
dc.creator | Koutentis, Panayiotis Andreas | en |
dc.creator | Krassos, H. | en |
dc.creator | Rawson, J. M. | en |
dc.creator | Tasiopoulos, Anastasios J. | en |
dc.date.accessioned | 2019-11-21T06:17:50Z | |
dc.date.available | 2019-11-21T06:17:50Z | |
dc.date.issued | 2011 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/55361 | |
dc.description.abstract | 1,3-Diphenyl-7-trifluoromethyl-1,4-dihydro-1,2,4-benzotriazin-4-yl (4), prepared in SSSShigh yield via the catalytic oxidation of the corresponding amidrazone 5 by using Pd/C (1.6 mol ss%) and 1,8-diazabicyclo[5.4.0]undec-7-ene (0.1 equiv) in air, is stable in dichloromethane solutions in the presence of MnO2 and KMnO4. Furthermore, radical 4 is thermally stable well past its melting point (160-161 °C) with a decomposition onset temperature of 288 °C. X-ray studies show that radical 4 packs in equidistant slipped π-stacks along the a axis. Cyclic voltammetry shows two fully reversible waves, corresponding to the -1/0, 0/+1 processes. EPR studies indicate that the spin density is mainly delocalized on the triazinyl fragment of the heterocycle. Magnetic susceptibility measurements in the 5-300 K region showed that the radical obeys Curie-Weiss behavior down to 10 K (C = 0.376 emuÂKÂmol-1 and I = +1.41 K) consistent with weak ferromagnetic interactions between S = 1/2 radicals. Subsequent fitting of the magnetic data to a 1D ferromagnetic chain model provided an excellent fit (g = 2.00, J/k = +1.49 K) down to 10 K but failed to reproduce the subsequent decrease in T at lower temperatures, which has been ascribed to the onset of weaker antiferromagnetic interactions between ferromagnetic chains. © 2011 American Chemical Society. | en |
dc.source | Journal of Organic Chemistry | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-79953873150&doi=10.1021%2fjo200210s&partnerID=40&md5=445d0a276b4466d3dc77c99cced3a6a9 | |
dc.subject | article | en |
dc.subject | decomposition | en |
dc.subject | unclassified drug | en |
dc.subject | synthesis | en |
dc.subject | Ferromagnetic materials | en |
dc.subject | Ferromagnetism | en |
dc.subject | Antiferromagnetism | en |
dc.subject | Magnetic susceptibility | en |
dc.subject | ferromagnetic material | en |
dc.subject | melting point | en |
dc.subject | temperature | en |
dc.subject | catalysis | en |
dc.subject | electron spin resonance | en |
dc.subject | thermostability | en |
dc.subject | oxidation | en |
dc.subject | radical | en |
dc.subject | Catalytic oxidation | en |
dc.subject | Antiferro-magnetic interactions | en |
dc.subject | 1,3 diphenyl 7 trifluoromethyl 1,4 dihydro 1,2,4 benzotriazin 4 yl | en |
dc.subject | air | en |
dc.subject | amidrazone | en |
dc.subject | Curie-Weiss behaviors | en |
dc.subject | Cyclic voltammetry | en |
dc.subject | Dichloromethane | en |
dc.subject | Dichloromethane solutions | en |
dc.subject | Electron spin resonance spectroscopy | en |
dc.subject | EPR studies | en |
dc.subject | Ferro-magnetic interactions | en |
dc.subject | Ferromagnetic chains | en |
dc.subject | Heterocycles | en |
dc.subject | Magnetic data | en |
dc.subject | Magnetic susceptibility measurements | en |
dc.subject | Manganese oxide | en |
dc.subject | Onset temperature | en |
dc.subject | potentiometry | en |
dc.subject | radical reaction | en |
dc.subject | Spin densities | en |
dc.subject | Thermally stable | en |
dc.subject | Trifluoromethyl | en |
dc.subject | X-ray studies | en |
dc.title | Characterization and magnetic properties of a "super stable" radical 1,3-diphenyl-7-trifluoromethyl-1,4-dihydro-1,2,4-benzotriazin-4-yl | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1021/jo200210s | |
dc.description.volume | 76 | |
dc.description.issue | 8 | |
dc.description.startingpage | 2798 | |
dc.description.endingpage | 2806 | |
dc.author.faculty | 002 Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied Sciences | |
dc.author.department | Τμήμα Χημείας / Department of Chemistry | |
dc.type.uhtype | Article | en |
dc.description.notes | <p>Cited By :39</p> | en |
dc.source.abbreviation | J.Org.Chem. | en |
dc.contributor.orcid | Tasiopoulos, Anastasios J. [0000-0002-4804-3822] | |
dc.contributor.orcid | Koutentis, Panayiotis Andreas [0000-0002-4652-7567] | |
dc.contributor.orcid | Constantinides, Christos P. [0000-0001-6364-1102] | |
dc.gnosis.orcid | 0000-0002-4804-3822 | |
dc.gnosis.orcid | 0000-0002-4652-7567 | |
dc.gnosis.orcid | 0000-0001-6364-1102 | |