Search Results - "Casagrande, Osvaldo L"

Chromium Complexes Supported by Phenyl Ether‐Pyrazolyl [N,O] Ligands as Catalysts for the Oligo‐ and Polymerization of Ethylene by Milani, Jorge L.S., Casagrande, Osvaldo L.

“…A new series of Cr (III) complexes [Cr{1‐(3‐phenoxypropyl)‐1H‐pyrazole}Cl3]2 (Cr1), [Cr{1‐(3‐phenoxypropyl)‐3,5‐dimethyl‐1H‐pyrazole}Cl3]2 (Cr2), and…”
Get full text

Scandium versus yttrium{amino-alkoxy-bis(phenolate)} complexes for the stereoselective ring-opening polymerization of racemic lactide and β-butyrolactone by Chapurina, Yulia, Klitzke, Joice, Casagrande, Jr, Osvaldo de L, Awada, Mouhamad, Dorcet, Vincent, Kirillov, Evgueni, Carpentier, Jean-François

“…Scandium and yttrium amide complexes Ln{ONXO(R1,R2)}(N(SiHMe2)2)(THF)n (Ln = Sc, n = 0 or Y, n = 1; X = NMe2 or OMe; R(1) = Cumyl or p-Cl-Cumyl; R(2) = Me or…”
Get more information

Vanadium(III) complexes containing phenoxy–imine–thiophene ligands: Synthesis, characterization and application to homo‐ and copolymerization of ethylene by Prado, Nayara T., Ribeiro, Ronny R., L. Casagrande, Osvaldo

“…A set of vanadium(III) complexes, namely {SNO}VCl2(THF)2 (2a, SNO = thiophene‐(N═CH)‐phenol; 2b, SNO = 5‐phenylthiophene‐(N═CH)‐phenol; 2c,…”
Get full text

Bis(pyrazolyl)thioether/amine‐chromium(III) catalysts bearing pendant O‐ and N‐donor group for oligomerization and polymerization of ethylene by Oliveria, Lucilene L., Oliboni, Robson S., Stieler, Rafael, Casagrande, Adriana C. A., Casagrande, Osvaldo L.

“…In this work, a new family of chromium complexes supported by bis(pyrazolyl)thioether/amine ligands containing pendant O‐ and N‐donor groups…”
Get full text

Oligomerization of ethylene promoted by methylaluminoxane activated arylchalcogenyl‐sulfonate nickel(II) complexes by Costa, Miriã Terra, Lopes, Eric Francis, Oliboni, Robson S., Lüdtke, Diogo S., Casagrande, Osvaldo L., Stieler, Rafael

“…A new synthetic route to arylchalcogenyl‐sulfonate ligands (E,SO) (E = Se, S) and the synthesis and ethylene reactivity of two new nickel complexes…”
Get full text

Synthesis and Characterization of Imino-Phenolate Titanium Complexes and Their Use in Homo- and Copolymerization of Ethylene by da S. Gomes, Fernando, Bergamo, Adão L., de L. Casagrande Jr, Osvaldo

“…A set of titanium precatalysts [(L)TiCl3] based on imino‐phenolate tridentate ligands (Ti1, L = 3,5‐tBu‐2‐(OH)C6H2CH‐N‐8‐C9H6N; Ti2, L =…”
Get full text

Aluminum and Zinc Complexes Based on an Amino-Bis(pyrazolyl) Ligand:  Synthesis, Structures, and Use in MMA and Lactide Polymerization by Lian, Bing, Thomas, Christophe M, Casagrande, Osvaldo L, Lehmann, Christian W, Roisnel, Thierry, Carpentier, Jean-François

“…The coordination chemistry of bis[2-(3,5-dimethyl-1-pyrazolyl)ethyl]amine (1, LH) with aluminum- and zinc-alkyls has been studied. Reaction of 1 with AlR3…”
Get full text

Mixed Aluminum-Magnesium-Rare Earth Allyl Catalysts for Controlled Isoprene Polymerization: Modulation of Stereocontrol by Ajellal, Noureddine, Furlan, Luciano, Thomas, Christophe M., Casagrande Jr, Osvaldo L., Carpentier, Jean-François

“…The performances of readily available Ln(allyl)2Cl(MgCl2)2 · (THF)4 precursors (Ln = Nd, 1; Y, 2; La, 3), in combination with alkyl aluminum activators [MAO,…”
Get full text

Ethylene polymerization using tris(pyrazolyl)borate titanium(IV) catalyst supported in situ on MAO-modified silica by Gil, Marcelo P., Casagrande, Osvaldo L.

“…The in situ immobilization of Tp Ms*TiCl 3 ( 1) on MAO-modified SiO 2 is able to produce high-density polyethylenes with different properties. The…”
Get full text

Highly Selective Nickel Ethylene Oligomerization Catalysts Based on Sterically Hindered Tris(pyrazolyl)borate Ligands by Kunrath, Fábio A, de Souza, Roberto F, Casagrande, Osvaldo L, Brooks, Neil R, Young, Victor G

“…The reaction of TlTp‘ (Tp‘ = HB(3-mesitylpyrazolyl)3 - (TpMs), HB(3-mesitylpyrazolyl)2(5-mesitylpyrazolyl)- (TpMs*)) with NiCl2·6H2O affords TpMsNiCl (1) and…”
Get full text

Linear low‐density polyethylene nanocomposites by in situ polymerization using a zirconium‐nickel tandem catalyst system by Pinheiro, Adriana C, Casagrande, Adriana C. A, Casagrande, Osvaldo L., Jr

“…A series of linear low‐density polyethylene (LLDPE) nanocomposites containing different types of nanofiller (TiO₂, MWCNT, expanded graphite, and boehmite) were…”
Get full text

Ethylene polymerization using tris(pyrazolyl)borate vanadium (V) catalysts in situ supported on MAO-modified silica by Casagrande, Adriana C.A., dos Anjos, Patrícia S., Gamba, Douglas, Casagrande, Osvaldo L., dos Santos, João H.Z.

“…The in situ immobilization of Tp Ms*V(L)Cl 2 ( 1, L = N t Bu; 2, L = O) on SiO 2, MAO-modified SiO 2 and on TMA-modified SiO 2 affords active ethylene…”
Get full text

Chromium complexes based on thiophene–imine ligands for ethylene oligomerization by Ferreira, Jorge, Zilz, Raquel, Boeira, Igor S., Silva, Sabrina M., Casagrande, Adriana C.A., Casagrande, Osvaldo L.

“…A new set of Cr(III) complexes, {L}CrCl3(THF), based on thiophene–imine (2a, L = PhOC6H4(N═CH)‐2‐SC4H3; 2b, L = PhOC2H4(N═CH)‐2‐SC4H3; 2c,…”
Get full text

Synthesis and characterization of ether-imine-furfural [ONO] nickel(II) complexes and their application in oligomerization of ethylene by Milani, J.L.S., Casagrande, A.C.A., Livotto, P.R., Casagrande, Osvaldo L.

“…[Display omitted] •New class of nickel catalysts bearing ether-imine-furfural ligands.•XPS data and DFT results indicate the formation of nickel dimeric…”
Get full text

Highly active zirconium(IV) catalyst containing sterically hindered hydridotris(pyrazolyl)borate ligand for the polymerization of ethylene by Furlan, Luciano G., Gil, Marcelo P., Casagrande Jr, Osvaldo L.

“…The synthesis and characterization of the novel zirconium (IV) tris(pyrazolyl)borate compound {TpMs*}ZrCl3 (1) (TpMs* =…”
Get full text

Ethylene oligomerization promoted by chromium complexes bearing pyrrolide-imine-amine/ether tridentate ligands by Pinheiro, A C, Roisnel, T, Kirillov, E, Carpentier, J-F, Casagrande, Osvaldo L

“…Chromium(iii) complexes [CrCl2(L)(THF)] based on monoanionic tridentate ligands [, L = {2-(C4H3N-2'-CH[double bond, length as m-dash]N)C2H4NHPh}; , L =…”
Get more information

Chromium complexes bearing pyrazolyl-imine-phenoxy/pyrrolide ligands: Synthesis, characterization, and use in ethylene oligomerization by Bergamo, Adão L., Da Cas, Halana K., Rambo, Raoni S., Schwalm, Cristiane S., Casagrande, Adriana C.A., Stieler, Rafael, Casagrande, Osvaldo L.

“…Chromium(III) complexes {NNZ}CrCl2(THF) (2a-d) (NNZ=pyrazolyl-imine-phenoxy/pyrrolide) have been synthesized and characterized by elemental analysis and X-ray…”
Get full text

Tandem Action of TpMsNiCl and Supported Cp2ZrCl2 Catalysts for the Production of Linear Low-Density Polyethylene by Kuhn, Maria Cristina A., da Silva, Jaqueline L., Casagrande, Adriana C. A., Mauler, Raquel S., Casagrande Jr, Osvaldo L.

“…Linear low‐density polyethylene (LLDPE) samples with different properties were prepared from ethylene, without the addition of an α‐olefin co‐monomer, using a…”
Get full text

Nickel Complexes Based on Tridentate Pyrazolyl Ligands for Highly Efficient Dimerization of Ethylene to 1-Butene by Ajellal, Noureddine, Kuhn, Maria C. A, Boff, Andressa D. G, Hörner, Manfredo, Thomas, Christophe M, Carpentier, Jean-François, Casagrande, Osvaldo L

“…A series of new pentacoordinated nickel complexes NiCl2(NZN) based on nitrogen-, oxygen-, or sulfur-bridged bis(pyrazolyl) ligands (NZN) were synthesized and…”
Get full text

Thallium−Arene Contacts in a Rare Yttrium Tris(pyrazolyl)hydroborate "ate" Complex by Kunrath, Fábio A., Casagrande Jr, Osvaldo L., Toupet, Loic, Carpentier, Jean-François

“…A salt elimination reaction between [YCl3(THF)3.5] and 1 or 2 equiv. of Tl(TpMs*) [TpMs* = HB(3‐mesitylpyrazolyl)2(5‐mesitylpyrazolyl)−] leads in both cases to…”
Get full text