Results 21 to 30 of about 12,941 (225)

Nucleus-independent chemical shift profiles along the intrinsic distortion path for Jahn-Teller active molecules. Study on cyclopentadienyl radical and cobaltocene [PDF]

Journal of the Serbian Chemical Society, 2015
The aromatic/antiaromatic behavior of the cyclopentadienyl anion (Cp-), bis(η5-cyclopentadienyl)iron(II) (Fe(Cp)2), as well as of the Jahn-Teller (JT) active cyclopentadienyl radical (Cp∙) and bis(η5-cyclopentadienyl)cobalt(II) (Co(Cp)2) has ...
Anđelković Ljubica, Perić Marko, Zlatar Matija, Gruden-Pavlović Maja   +3 more
doaj   +1 more source

Immobilizing metallocene by solid polymethylaluminoxane “sMAO” for slurry-phase ethylene-1-hexene copolymerization [PDF]

MATEC Web of Conferences, 2022
In the field of olefin catalytic polymerization, metallocene catalysts show higher activity than traditional Ziegler-Natta catalysts. In this study, benzoic acid catalyzed the controlled hydrolysis of trimethylaluminum (TMA) to methylaluminoxane (MAO ...
Wu Chaofan, Ge Tengjie, Jiang Zeyu, Jiang Yanfeng, Zhang Qian, Li Jian   +5 more
doaj   +1 more source

Kinetic and microstructural studies of Cp2ZrCl2 and Cp2HfCl2-catalyzed oligomerization of higher α-olefins in mPAO oil base stocks production [PDF]

Polyolefins Journal, 2021
Herein a quenched-flow kinetic technique was applied to calculate the rate constants of 1-hexene and 1-octene oligomerization catalyzed by the Cp2ZrCl2 and Cp2HfCl2/MAO catalyst systems, and subsequently a mechanism for the higher α-olefin ...
Ahad Hanifpour, Mahdi Hashemzadeh Gargari, Mohammad Reza Rostami Darounkola, Zahra Kalantari, Naeimeh Bahri-Laleh   +4 more
doaj   +1 more source

Amine, Amido, and Imido Complexes of Tantalum Supported by a Pyridine-Linked Bis(phenolate) Pincer Ligand: Ta−N π-Bonding Influences Pincer Ligand Geometry [PDF]

, 2009
A series of tantalum imido and amido complexes supported by a pyridine-linked bis(phenolate) ligand has been synthesized. Characterization of these complexes via X-ray crystallography reveals both C_s and C_2 binding modes of the bis(phenolate)pyridine ...
Bercaw, John E., Day, Michael W., Henling, Larry M., Tonks, Ian A.   +3 more
core   +2 more sources

Uranium(III) coordination chemistry and oxidation in a flexible small-cavity macrocycle [PDF]

, 2015
U(III) complexes of the conformationally flexible, small-cavity macrocycle trans-calix[2]benzene[2]pyrrolide (L)2–, [U(L)X] (X = O-2,6-tBu2C6H3, N(SiMe3)2), have been synthesized from [U(L)BH4] and structurally characterized. These complexes show binding
Arnold P. L., Arnold P. L., Arnold P. L., Arnold P. L., Arnold P. L., Arnold P. L., Cooper O., Ephritikhine M., Evans W. J., Gardner B. M., Higgins J. A., Ilango S., Jason B. Love, Joy H. Farnaby, La Pierre H. S., Lankamp H., Mansell S. M., Mansell S. M., Marks T. J., Michael G. Gardiner, Polly L. Arnold, Shannon R. D., Stewart J. L.   +22 more
core   +3 more sources

Synthesis and Application of Bis[1,2-(4-aryl-2-alkyl-1H- inden-1-yl)]Ethane as an Efficient`Ligand for Preparation of Olefin Polymerization Catalysts [PDF]

Journal of Sciences, Islamic Republic of Iran, 2019
In this study, a class of bis-1,2-(4-aryl-2-alkyl-1H- inden-1-yl) ethane was synthesized and characterized by spectroscopic methods such as 1HNMR, 13CNMR, melting point and FTIR.
v. Lotfi, B. Emamgholi, S. T. Bahrami, E. poorakbar   +3 more
doaj   +1 more source

The effect of the amido substituent on polymer molecular weight in propene homopolymerisation by titanium cyclopentadienyl-amide catalysts [PDF]

, 2000
In the homopolymerisation of propene by the cyclopentadienyl-amide titanium catalyst systems [η5,η1-C5H4(CH2)2NR]TiCl2/MAO and [η5,η1-C5H4(CH2)2NR]Ti(CH2Ph)2/B(C6F5)3 (R = tBu, iPr, Me), the catalyst with the smallest substituent (Me) on the amido moiety
Hessen, Bart,, Sinnema, Piet-Jan,, Teuben, Jan H.,   +2 more
core   +1 more source

Comparative Analysis of Ethylene/Diene Copolymerization and Ethylene/Propylene/Diene Terpolymerization Using Ansa-Zirconocene Catalyst with Alkylaluminum/Borate Activator: The Effect of Conjugated and Nonconjugated Dienes on Catalytic Behavior and Polymer Microstructure

Molecules, 2021
The copolymerization of ethylene‒diene conjugates (butadiene (BD), isoprene (IP) and nonconjugates (5-ethylidene-2-norbornene (ENB), vinyl norbornene VNB, 4-vinylcyclohexene (VCH) and 1, 4-hexadiene (HD)), and terpolymerization of ethylene-propylene ...
Amjad Ali, Muhammad Khurram Tufail, Muhammad Imran Jamil, Waleed Yaseen, Nafees Iqbal, Munir Hussain, Asad Ali, Tariq Aziz, Zhiqiang Fan, Li Guo   +9 more
doaj   +1 more source

Tamoxifen-like metallocifens target thioredoxin system determining mitochondrial impairment leading to apoptosis in Jurkat cells [PDF]

, 2017
Tamoxifen-like metallocifens (TLMs) of the group-8 metals (Fe, Ru, and Os) show strong anti-proliferative activity on cancer cell lines resistant to apoptosis, owing to their unique redox properties. In contrast, the thioredoxin system, which is involved
Alberto Bindoli, Alessandra Folda, Anne Vessières, Gérard Jaouen, Hui Zhi Shirley Lee, Maria Pia Rigobello, Michèle Salmain, Pascal Pigeon, Siden Top, Valeria Scalcon   +9 more
core   +3 more sources

Synthesis and characterization of a tert-butyl ester-substituted titanocene dichloride: t-BuOOCCp2TiCl2

Acta Crystallographica Section E: Crystallographic Communications, 2020
Bis[η5-(tert-butoxycarbonyl)cyclopentadienyl]dichloridotitanium(IV), [Ti(C10H13O2)2Cl2], was synthesized from LiCpCOOt-Bu using TiCl4, and was characterized by single-crystal X-ray diffraction and 1H NMR spectroscopy.
Jackson S. McCarthy, Colin D. McMillen, Jared A. Pienkos, Paul S. Wagenknecht   +3 more
doaj   +1 more source