Journal ArticleDOI
Mono-η-cyclopentadienyl-benzamidinato compounds of titanium, zirconium and hafnium
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In this paper, the new compounds [M(η-C5R5] and Zr(Zr(C5H5) are described, where Zr acts as a cocatalyst for the polymerisation of ethylene and propene.Abstract:
The new compounds [M(η-C5R5){η-R′NC(Ph)NR′}Cl2][where R′= Me3,Si (TMS), and R = H, M = Ti,Zr, Hf or R = Me, M = Ti or Zr], [Zr(η-C5R5){(η-R′NC(Ph)NR′}(CH2Ph)Cl](R = H, Me), and [Zr(η-C5R5){η-R′NC(Ph)NR}(CH2Ph)2](R = H, Me) are described; the compound [Zr(η-C5H5){η-R′C(Ph)R′}Cl2] acts as a cocatalyst for the polymerisation of ethylene and propene.read more
Citations
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Journal ArticleDOI
N-silylated benzamidines: versatile building blocks in main group and coordination chemistry
TL;DR: The main group and coordination chemistry of N-silylated benzamidines, RC6H4C(NSiMe3)[N(SiMe3)2], and their corresponding anions, [RC6H 4C(NSiME3]−, is reviewed in this paper.
Journal ArticleDOI
Synthesis, Structures, Bonding, and Ethylene Reactivity of Group 4 Metal Alkyl Complexes Incorporating 8-Quinolinolato Ligands
TL;DR: In this article, the synthesis, structures, bonding, and reactivity of neutral (Ox)2MR2 and cationic (O2MR+ zirconium and hafnium alkyl complexes which contain substituted 8-quinolinolato ligands are described.
Journal ArticleDOI
Polymerization catalysis with transition metal amidinate and related complexes
Scott Collins,Scott Collins +1 more
TL;DR: In this paper, the use of transition metal amidinate, guanidinate and amidopyridine complexes to olefin coordination polymerization is reviewed, and a comparison of these complexes with other related ligands is presented.
Journal ArticleDOI
Titanium(II), -(III), and -(IV) Complexes Supported by Benzamidinate Ligands
John R. Hagadorn and,John Arnold +1 more
TL;DR: The synthesis and reactivity of a wide range of titanium benzamidinates is described in this article, where the authors describe the synthesis and reactionivity of different types of benamidinate derivatives.
Journal ArticleDOI
Bulky Bis(alkylamidinate) Complexes of Group 4. Syntheses and Characterization of M(CyNC(R‘)NCy)2Cl2 and Zr(CyNC(Me)NCy)2Me2 (R‘= Me, M = Ti, Zr, Hf; R‘ = tBu, M = Zr)
Adam Littke,Nassrin Sleiman,Corinne Bensimon,Darrin S. Richeson,Glenn P. A. Yap,Stephen J. Brown +5 more
TL;DR: In this paper, a series of bis(alkylamidinate) group 4 compounds of the general formula M(CyNC(CH3)NCy)2Cl2 (M = Ti (1), Zr (2), Hf (3); Cy = cyclohexyl) were reported.
References
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An empirical method for correcting diffractometer data for absorption effects
N. Walker,David I. Stuart +1 more
TL;DR: In this article, a Fourier series in the polar angles of the incident and diffracted beam paths is used to model an absorption surface for the difference between the observed and calculated structure factors.
Book ChapterDOI
Chemistry of Cationic Dicyclopentadienyl Group 4 Metal-Alky I Complexes
TL;DR: In this article, the chemistry of cationic dicyclopentadienyl group 4 metal-alkyl complexes was discussed and it was shown that Cp 2 M(R) + ions are active species in the soluble catalyst systems.
Journal ArticleDOI
Surface-bound metal hydrocarbyls. Organometallic connections between heterogeneous and homogeneous catalysis
Journal ArticleDOI
Metallocene/polypropylene structural relationships: Implications on polymerization and stereochemical control mechanisms
John A. Ewen,M. J. Elder,Robert L. Jones,Luc Haspeslagh,Jerry L. Atwood,Simon G. Bott,Kerry D. Robinson +6 more
TL;DR: A series of group 4 metallocenes possessing chiral ligand environments have been characterized and their structures compared with their propylene polymerizations as discussed by the authors, and the relative catalyst stereospecificities suggest specific π-face selectivities and nonbonded contacts.
Journal ArticleDOI
Standardized polymerizations of ethylene and propene with bridged and unbridged metallocene derivatives: A comparison†
TL;DR: In this article, the catalytic activity of the two unbridged and 9 ansa-metallocenes as well as the properties of the polymers, such as molecular weight, width of molecular weight distribution, melting point, and, with polypropene, chain microstructure, were investigated.