title: Spectral and thermal studies on ruthenium carbonyl complexes with 5-trifluoromethyl-2,4-dihydropyrazol-3-one ligands.
abstract: Reactions of the cluster compound [Ru(3)(CO)(12)] with 5-trifluoromethyl-2,4-dihydropyrazol-3-one (HL(1)), 4-(2,4-dichlorophenylhydrazono)-5-trifluoromethyl-2,4-dihydropyrazol-3-one (H(2)L(2)), 4-(3-fluorophenylhydrazono)-5-trifluoromethyl-2,4-dihydropyrazol-3-one (H(2)L(3)), 4-(3-trifuoloromethyl-phenylhydrazono)-5-trifluoromethyl-2,4-dihydropyrazol-3-one (H(2)L(4)) and 4-(3-nitrophenylhydrazono)-5-trifluoromethyl-2,4-dihydropyrazol-3-one (H(2)L(5)) have been carried out in benzene and under reduced pressure. The structures of the isolated complexes were elucidated using elemental analyses, IR, UV-vis, mass and NMR spectroscopy. All the complexes are diamagnetic and have trigonal bipyramidal structures with general formulae [Ru(CO)(4)(HL(1))] and [Ru(CO)(3)(H(2)L(2-5))]. The thermal decompositions of the complexes were studied in correlation with the mass spectral fragmentation patterns.
authors.affiliation: Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt. ahmedsoliman61@gmail.com
authors.forename: Ahmed A
authors.initials: AA
authors.lastname: Soliman
mesh_terms: D002244:Carbon / Q000737:chemistry; D004121:Dimethyl Sulfoxide / Q000737:chemistry; D004553:Electric Conductivity; D004577:Electron Probe Microanalysis; D006859:Hydrogen / Q000737:chemistry; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D008280:Magnetics; D015394:Molecular Structure; D008970:Molecular Weight; D009584:Nitrogen / Q000737:chemistry; D047069:Pyrazolones / Q000737:chemistry* / Q000378:metabolism; D012015:Reference Standards; D012428:Ruthenium / Q000737:chemistry* / Q000378:metabolism; D012997:Solvents / Q000737:chemistry; D013053:Spectrophotometry; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013237:Stereoisomerism; D013696:Temperature; D013818:Thermogravimetry
chemical_list: D008024:Ligands; D047069:Pyrazolones; D012997:Solvents; C038362:pyrazolone; D002244:Carbon; D012428:Ruthenium; D006859:Hydrogen; D009584:Nitrogen; D004121:Dimethyl Sulfoxide