12627-62-2Relevant articles and documents
Spectral and thermal studies for some transition metal complexes of bis(benzylthiocarbohydrazone) focusing on EPR study for Cu(II) and VO2+
Abu-Melha, Khlood S.,El-Metwally, Nashwa M.
, p. 277 - 283 (2008)
The coordination behavior of bis (benzylthiocarbohydrazone) as a macrocyclic ligand (H2BBTC), towards Co(II), Ni(II), Cu(II) nitrates, Cd(II) and Pt(IV) chlorides as well as VO2+ sulphate has been investigated. The elemental analysis, magnetic moments, spectral (UV-vis, IR, 1H NMR and EPR) with thermal studies were used to characterize the isolated complexes. The IR spectra showed that the ligand acts as a binegative hexadentate donor through NH groups and thiol S atoms. Electronic and magnetic data proposed the octahedral structure for all complexes under investigation, except VO2+, is a square-pyramidal geometry. EPR spectra for VO2+ and Cu(II) reveal data confirmed the proposed structures. The ionization constants (pK1 = 8.3 and pK2 = 7.7) of the ligand and the stability constants of its complexes in solution were determined. The TG analysis for most complexes supports the absence of solvent molecules in or out the coordination sphere through the high thermal stability observed on the thermal curves for the investigated complexes.
Transformation of a model FCC gasoline olefin over transition monometallic sulfide catalysts
Daudin,Brunet,Perot,Raybaud,Bouchy
, p. 111 - 119 (2007)
The selective HDS of FCC gasoline is a sensible option for reducing sulfur content in commercial gasoline. For such application, a minimum activity of the catalyst toward olefin hydrogenation is required to preserve the high octane number of the feedstock. The conversion of a model FCC olefin (2,3-dimethylbut-2-ene:23DMB2N) under close HDS conditions was investigated over a series of unsupported transition monometallic sulfides (FeS, Ni3S2, PdS, Co9S8, Rh2S3, RuS2, PtS, and MoS2). The results reveal for the first time that a volcano curve relationship exists between the ab initio calculated sulfur-metal bond energy, E (MS), descriptor of bulk TMS, and their activities in olefin hydrogenation under the conditions of HDS of FCC gasoline. In particular, Rh2S3, with an intermediate metal sulfide bond energy of 119 kJ/mol, was the most active catalyst in hydrogenation of the model olefin. In a similar spirit as volcano curves obtained for the HDS of dibenzothiophene and hydrogenation of toluene and recently reported in the literature, a microkinetic model furnished a rational interpretation of this trend.
Synthesis and characterization of some transition metal complexes of thiosemicarbazones derived from 2-acetylpyrrole and 2-acetylfuran
Youssef, Nabil S.,Hegab
, (2005)
Copper(II), nickel(II), palladium(II), platinum(II), and silver(I) complexes of 2-acetylpyrrole thiosemicarbazone (H2L1) and copper(II), nickel(II), platinum(II) and zinc(II) complexes of 2-acetylfuran thiosemicarbazone (HL2/su
