Global ETD Search

1	Metal Complexes of Chelating Phenolate Nitrogen Ligands Lin, Sheng-ta 23 July 2012 (has links) Amine bis(phenolate) ligands synthesis can be easily prepared by the reaction of a substituted 2-(bromomethyl)phenol, a substituted phenol, potassium carbonate, triethylamine and the appropriate amine to form the desired compounds in high yields and purities. A series of amine bis(phenolate) ligand precursors with group 4 metals and aluminum complexes have been prepared, characterized by single-crystal X-ray diffraction, and tested for ring opening polymerisation of £`-caprolactone. Group 4 metals complexes which are shown to be active catalysts for the ROP of £`-caprolactone with excellent conversions and polydispersities. All aluminum compounds as four-coordinate aluminum methyl complexes show excellent catalytic activity toward the ring opening polymerization of £`-caprolactone in the presence of benzyl alcohol. And amine bis(phenolate)s ligand ([tert-ButylONO]2-) bond cleavage with zirconium and hafnium complexes that have been prepared, characterized by single-crystal X-ray diffraction. Another zirconium complexes of dianionic amine bis(phenolate) ligands have been synthesized, their X-ray structures solved, and their activity as 1-hexene polymerization catalysts study. Upon treatment with B(C6F5)3, a series of pentacoordinate [ONO]Zr(CH2Ph)2 complex, having no extra donor group, shows only poor activity as a polymerization catalyst. Final reaction of diamine-bis(phenol) ligands containing a mixture of [i-PropylONO]Ti(OiPr)2 in dry THF under RT without exclusion of air and moisture gives {[i-PropylONO]TiO}3 (characterised by X-ray crystallography) is hydrolysed with H2O. chelating phenolate nitrogen ligands group 4 metals poly(caprolactone) aluminum metal poly(1-hexene)
2	Partikelbildung bei der Alkenozonolyse und ihre Kopplung an die Radikalchemie / Particle formation during the ozonolysis of alkenes and its interconnection with radical chemistry Keunecke, Claudia 11 May 2012 (has links) No description available. 540 Chemie SD 000 SGE 300 SGE 450 Chemistry Ozonolyse FTIR-Spektroskopie Gasphasenprodukte Kinetik Partikelbildung Schwefelsäure Hexen Butensäure α-Pinen β-Pinen 4-Penten-1-ol 3-Buten-1-ol 1-Penten-3-ol 1-Penten-3-on 4-Pentenal ozonolysis FTIR-spectroscopy gas phase products kinetics particle formation sulfuric acid hexene butenoic acid α-pinene β-pinene 4-penten-1-ole 3-buten-1-ole 1-penten-3-ole 1-penten-3-one 35.22 58.14 38.81 35.25

Search results

Metal Complexes of Chelating Phenolate Nitrogen Ligands

Partikelbildung bei der Alkenozonolyse und ihre Kopplung an die Radikalchemie / Particle formation during the ozonolysis of alkenes and its interconnection with radical chemistry