Search results for "Ylide"

showing 10 items of 1084 documents

Atom transfer radical polymerization with different halides (F, Cl, Br, and I): Is the process "living" in the presence of fluorinated initiators?

2016

Atom transfer radical polymerization (ATRP) is often used for grafting from fluorinated polymers. Nevertheless, the possibility to initiate an ATRP from a C-F functionality and the activity of the catalysts in the presence of fluoride anions are essentially unexplored. Therefore, we investigated the thermodynamics and kinetics of C-F bond activation by ATRP catalysts and compared it with other halide systems. The ATRP equilibrium constant was estimated to be small for the reaction between [CuITPMA]+ and benzyl fluoride (TPMA = tris(2-pyridylmethyl)- amine). However, [CuITPMA] + could react with the more active initiator diethyl fluoromalonate (DEFM). With DEFM as initiator and CuIBr/TPMA as…

Polymers and PlasticsPOLY(VINYLIDENE FLUORIDE) ATRP HALOGEN EXCHANGE FLUORIDE INITIATORSHalide02 engineering and technologyATRP010402 general chemistry01 natural sciencesCatalysisStyreneInorganic Chemistrychemistry.chemical_compoundBenzyl fluoridePolymer chemistryFLUORIDE INITIATORSMaterials ChemistryMethyl acrylateEquilibrium constantMaterials Chemistry2506 Metals and AlloyPolymers and PlasticChemistryAtom-transfer radical-polymerizationOrganic ChemistryHALOGEN EXCHANGESettore ING-IND/27 - Chimica Industriale E Tecnologica021001 nanoscience & nanotechnology0104 chemical sciencesAmine gas treating0210 nano-technologyPOLY(VINYLIDENE FLUORIDE)
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Influence of high power ultrasound on physical-chemical properties of polypropylene films aimed for food packaging: barrier and contact angle features

2017

Investigation was focused on the impact of high power ultrasound (HPUS), also called thermosonication, on the oxygen permeation properties (permeability, solubility and diffusion coefficients) of barrier films aimed for food packaging. For this purpose, biaxially oriented polypropylene (BOPP) coated with acrylic/polyvinylidene chloride (BOPPAcPVDC) and biaxially oriented coextruded polypropylene (BOPPcoex) were used. The physical–chemical profile of the samples was determined using goniometry. There is a significant impact only of extreme HPUS conditions (the longest time and the highest amplitude) on the permeability, solubility and diffusion coefficients of oxygen through the BOPP films. …

PolypropyleneMaterials sciencePolymers and PlasticsOrganic Chemistry02 engineering and technologyPermeation010402 general chemistry021001 nanoscience & nanotechnology01 natural sciences0104 chemical sciencesContact angleFood packagingOxygen permeabilitychemistry.chemical_compoundchemistryPermeability (electromagnetism)Materials ChemistrySolubilityComposite material0210 nano-technologyPolyvinylidene chloridePolymer International
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A DFT study of the mechanism and selectivities of the [3 + 2] cycloaddition reaction between 3-(benzylideneamino)oxindole and trans -β-nitrostyrene

2016

The mechanism and regioselectivities and stereoselectivities of the [3 + 2] cycloaddition (32CA) reaction of 3-(benzylideneamino) oxindole (AY) and trans-β-nitrostyrene have been studied using both B3LYP and ωB97XD density functional theory methods together with the standard 6-31G(d) basis set. Four reactive pathways associated with the ortho and meta regioselective channels and endo and exo stereoselective approaches modes have been explored and characterized. While the B3LYP functional fails to predict the experimental regioselectivity, the ωB97XD one succeeds to predict the experimentally observed meta regioselectivity favoring the formation of meta/endo cycloadduct as the major isomer. …

Reaction mechanism010405 organic chemistryChemistryStereochemistryOrganic ChemistryRegioselectivityAzomethine ylide010402 general chemistry01 natural sciencesCycloaddition0104 chemical scienceschemistry.chemical_compoundStereoselectivityReactivity (chemistry)OxindolePhysical and Theoretical ChemistrySolvent effectsJournal of Physical Organic Chemistry
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CCDC 854063: Experimental Crystal Structure Determination

2012

Related Article: A.Molina-Ontoria, R.Garcia, A.Gouloumis, F.Giacalone, M.R.Torres, N.Martin|2012|Eur.J.Org.Chem.|2012|3581|doi:10.1002/ejoc.201200115

Space GroupCrystallography((910-bis(13-Dithiol-2-ylidene)-910-dihydroanthracen-2-yl)methyl)(triphenyl)phosphonium bromide acetonitrile solvateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1439186: Experimental Crystal Structure Determination

2016

Related Article: Toni Mäkelä, Miia-Elina Minkkinen, and Kari Rissanen|2016|Inorg.Chem.|55|1339|doi:10.1021/acs.inorgchem.5b02780

Space GroupCrystallography((mu2-1819-bis((2-Oxidobenzylidene)amino)-23568911121415-decahydro-147101316-benzohexaoxacyclooctadecine)-aqua-dioxo-bis(methanol)-sodium-uranium) hemikis(bis(mu2-1819-bis((2-oxidobenzylidene)amino)-23568911121415-decahydro-147101316-benzohexaoxacyclooctadecine)-bis(mu2-oxo)-dioxo-tetrakis(methanol)-di-sodium-di-uranium) methanol solvate hydrateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 224283: Experimental Crystal Structure Determination

2004

Related Article: J.Vicente, M.-T.Chicote, M.D.Abrisqueta, M.M.Alvarez-Falcon, M.C.R.de Arellano, P.G.Jones|2003|Organometallics|22|4327|doi:10.1021/om030372r

Space GroupCrystallography((t-butylamino)(diethylamino)methylidene)-(dimethylsulfinylmethyl)-gold(i) perchlorateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 194090: Experimental Crystal Structure Determination

2003

Related Article: M.Poyatos, E.Mas-Marza, J.A.Mata, M.Sanau, E.Peris|2003|Eur.J.Inorg.Chem.||1215|doi:10.1002/ejic.200390157

Space GroupCrystallography(12-bis((1-Methylimidazol-2-ylidene)methyl)benzene-CC')-(eta^4^-cyclo-octa-15-diene)-rhodium(i) hexafluorophosphateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 619714: Experimental Crystal Structure Determination

2006

Related Article: M.Cametti, M.Nissinen, A.D.Cort, K.Rissanen, L.Mandolini|2006|Inorg.Chem.|45|6099|doi:10.1021/ic060251u

Space GroupCrystallography(12-bis((2-oxy-3-(benzyloxy)benzylidene)amino)ethane-NN'OO')-dioxo-methanol-uranium acetone solvateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 977406: Experimental Crystal Structure Determination

2016

Related Article: Christoph Deckert, Denis Bittner, Luca M. Carrella, Dieter Schollmeyer and Eva Rentschler|2016|Eur.J.Inorg.Chem.||1738|doi:10.1002/ejic.201501400

Space GroupCrystallography(2-(((5-(ethylsulfanyl)-2H-134-thiadiazol-3-id-2-ylidene)hydrazinylidene)methyl)phenolato)-(2-((2-(5-(ethylsulfanyl)-134-thiadiazol-2-yl)hydrazono)methyl)phenolato)-cobalt(iii) acetonitrile solvateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1534659: Experimental Crystal Structure Determination

2017

Related Article: Karolina Zdyb, Maxym O. Plutenko, Rostislav D. Lampeka, Matti Haukka, Malgorzata Ostrowska, Igor O. Fritsky, Elzbieta Gumienna-Kontecka|2017|Polyhedron|137|60|doi:10.1016/j.poly.2017.07.009

Space GroupCrystallography(2-(35-dimethyl-1H-pyrazol-1-yl)-2-(hydroxyimino)-N'-[1-(pyridin-2-yl)ethylidene]acetohydrazide)-(2-(35-dimethyl-1H-pyrazol-1-yl)-2-(hydroxyimino)-N-[1-(pyridin-2-yl)ethylidene]ethanehydrazonato)-nickel(ii) perchlorate methanol solvate monohydrateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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