Search Results - "Jayaratne, Kumudini"

A Career in Catalysis: Max McDaniel by Jayaratne, Kumudini C, Cymbaluk, Ted H, Jensen, Michael D

“…Still going strong in his seventies, some of the work of Dr. Max McDaniel is briefly described in this account. Regarded as a titan of polyolefin catalysis by…”
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Stereospecific Living Ziegler−Natta Polymerization of 1-Hexene by Jayaratne, Kumudini C, Sita, Lawrence R

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Living Ziegler−Natta Cyclopolymerization of Nonconjugated Dienes:  New Classes of Microphase-Separated Polyolefin Block Copolymers via a Tandem Polymerization/Cyclopolymerization Strategy by Jayaratne, Kumudini C, Keaton, Richard J, Henningsen, David A, Sita, Lawrence R

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Dramatic Enhancement of Activities for Living Ziegler−Natta Polymerizations Mediated by “Exposed” Zirconium Acetamidinate Initiators:  The Isospecific Living Polymerization of Vinylcyclohexane by Keaton, Richard J, Jayaratne, Kumudini C, Henningsen, David A, Koterwas, Lisa A, Sita, Lawrence R

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Direct Methyl Group Exchange between Cationic Zirconium Ziegler−Natta Initiators and Their Living Polymers:  Ramifications for the Production of Stereoblock Polyolefins by Jayaratne, Kumudini C, Sita, Lawrence R

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s-Block Metal Complexes of the Bis(tetramethylcyclopentadienyl) Phosphonium Diylide [Me(t-Bu)P(C5Me4)2] by Brady, Erik D, Chmely, Stephen C, Jayaratne, Kumudini C, Hanusa, Timothy P, Young, Victor G

“…Treatment of the phosphonium salt [Me(t-Bu)P(C5Me4H)2]I with 2 equiv of KH produces the coordination polymer {K[Me(t-Bu)P(C5Me4)2](thf)}∞. If the phosphonium…”
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Structural Characterization of Zirconium Cations Derived from a Living Ziegler−Natta Polymerization System:  New Insights Regarding Propagation and Termination Pathways for Homogeneous Catalysts by Keaton, Richard J, Jayaratne, Kumudini C, Fettinger, James C, Sita, Lawrence R

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Formation and Crystal Structure of a Cationic Mono(cyclopentadienyl) Complex of Calcium, [(C5Me5)Ca(OPPh3)3]+I by Jayaratne, Kumudini C, Fitts, Lacey S, Hanusa, Timothy P, Young, Victor G

“…When the neutral Lewis base triphenylphosphine oxide reacts with (C5Me5)CaI(thf)2 in THF, the halide is displaced from the calcium to generate the stable…”
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Synthesis, Structure, and Chemical Vapor Deposition Studies of Molecular Precursors to NbP Films by Scheper, Joseph T, Jayaratne, Kumudini C, Liable-Sands, Louise M, Yap, Glenn P. A, Rheingold, Arnold L, Winter, Charles H

“…Treatment of niobium pentachloride with cyclohexylphosphine and phenylphosphine in dichloromethane afforded…”
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Describing and quantifying the chemical composition distribution in unimodal and multimodal ZN-polyethylene using CRYSTAF by Albrecht, Andreas, Jayaratne, Kumudini, Jeremic, Ljiljana, Sumerin, Victor, Pakkanen, Anneli

“…ABSTRACT A new approach in describing and quantifying the chemical composition distribution (CCD) in Ziegler–Natta‐polyethylene copolymers was developed by…”
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Imido Complexes Derived from the Reactions of Niobium and Tantalum Pentachlorides with Primary Amines:  Relevance to the Chemical Vapor Deposition of Metal Nitride Films by Jayaratne, Kumudini C, Yap, Glenn P. A, Haggerty, Brian S, Rheingold, Arnold L, Winter, Charles H

“…Reactions of niobium and tantalum pentachlorides with tert-butylamine (≥6 equiv) in benzene afford the dimeric imido complexes [NbCl2(NtBu)(NHtBu)(NH2 tBu)]2…”
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Ziegler–Natta catalysts supported on crystalline and amorphous MgCl2/THF complexes by Pirinen, Sami, Jayaratne, Kumudini, Denifl, Peter, Pakkanen, Tuula T.

“…•Ziegler–Natta catalysts with an amorphous or a crystalline MgCl2/THF support.•Interaction of TiCl4 with a crystalline MgCl2/THF support was studied.•Catalysts…”
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Polyethylenimines: Multidentate Electron Donors for Ziegler–Natta Catalysts by Nissinen, Ville H, Linnolahti, Mikko, Bazhenov, Andrey S, Pakkanen, Tuula T, Pakkanen, Tapani A, Denifl, Peter, Leinonen, Timo, Jayaratne, Kumudini, Pakkanen, Anneli

“…Polyethylenimines, polymers bearing amino functionalities, are studied for the first time as internal electron donors for Ziegler–Natta catalysts. An advantage…”
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Unexpected Competition between Vanadium and Zinc in the Synthesis of Sterically Bulky Metallocenes by Overby, Jason S, Jayaratne, Kumudini C, Schoell, Nathan J, Hanusa, Timothy P

“…Attempts to form (Cp3i)2V and (Cp4i)2V (Cp n i = C5(iPr) n H5 - n ) from the reaction of zinc-reduced VCl3 and K[Cp n i] in THF at room temperature produces…”
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Single-source precursors to niobium and tantalum pnictogenide thin films by Jayaratne, Kumudini Chandrika

“…The reactions of niobium and tantalum pentachloride with aliphatic amines and anilines led to the formation of complexes having general formulae…”
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