FI catalysts for olefin polymerization--a comprehensive treatment.

Metal catalysts for the vinyl/addition polymerization of norbornene

Relationships between Catalyst Structures and Catalytic Properties Hongliang Mu,† Li Pan,*,‡ Dongpo Song, and Yuesheng Li*,†,‡ †State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China ‡School of Material Science and Engineering, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin 300072, China Department of Polymer Science and Engineering, University of Massachusetts Amherst, 120 Governors Drive, Amherst, Massachusetts 01003, United States

Neutral Nickel Catalysts for Olefin Homo- and Copolymerization: Relationships between Catalyst Structures and Catalytic Properties

Binuclear Nickel and Copper Complexes with Bridging 2,5-Diamino-1,4-benzoquinonediimines: Synthesis, Structures, and Catalytic Olefin Polymerization

The organochalcogen ligands derived from 3-methyl-imidazole-2-thione/selone groups, Mbit, Mbis, Ebit and Ebis [Mbit = 1,1′-methylenebis(3-methyl-imidazole-2-thione); Mbis = 1,1′-methylenebis(3-methyl-imidazole-2-selone), Ebit = 1,1′-(1,2-ethanediyl)bis(3-methyl-imidazole-2-thione), Ebis = 1,1′-(1,2-ethanediyl)bis(3-methyl-imidazole-2-selone)] have been synthesized and characterized. Reactions of [Cp*Ir(μ-Cl)Cl]2 and [Cp*Rh(μ-Cl)Cl]2 (Cp* = η5-pentamethylcyclopentadienyl) with Mbit, Mbis, Ebit and Ebis result in the formation of the complexes [Cp*Ir(Mbit)Cl]Cl (1a·Cl), [Cp*Ir(Mbis)Cl]Cl (1b·Cl), [Cp*Ir(Ebit)Cl]Cl (2a·Cl), [Cp*Ir(Ebis)Cl]Cl (2b·Cl), [Cp*Rh(Mbit)Cl]Cl (3a·Cl), Cp*Rh(Mbis)Cl][Cp*RhCl3] (3b·[Cp*RhCl3]), [Cp*Rh(Ebit)Cl]Cl (4a·Cl) and [Cp*Rh(Ebis)Cl]Cl (4b·Cl), respectively. All compounds have been characterized by elemental analysis, NMR and IR spectra. The molecular structures of 1b, 2b, 3a, 3b and 4a have been determined by X-ray crystallography. After activation with methylaluminoxane (MAO), the iridium complexes exhibit moderate activities for the vinyl polymerization of norbornene.

Syntheses and structures of half-sandwich iridium(III) and rhodium(III) complexes with organochalcogen (S, Se) ligands bearing N-methylimidazole and their use as catalysts for norbornene polymerization.

Novel nickel(II) and copper(II) complexes with phenoxy-imidazole ligands: Syntheses, crystal structures and norbornene addition polymerization

Mid-frequency Raman difference spectra (MFRDS) analysis can be used to reveal the selective crystallization from solutions through determining the degree of similarity of the short-range orders between the assemblies of small organic molecules in solutions and their solid phases. Four solid phases of inosine (IR) (α-anhydrous IR (α-IR), β-anhydrous IR (β-IR), IR dihydrate (IRD), and amorphous IR (AmIR)) and two IR solutions (aqueous and 70 vol% DMSO aqueous solution) were prepared and characterized using MFRDS here. The MFRDS analysis results indicate that the selective formation of IRD and AmIR from IR aqueous solution and β-IR from IR 70 vol% DMSO solution are originated from the high similarity of their short-range structures. Moreover, we propose that the formation of α-IR from IR aqueous solution benefits from the appearance of AmIR as an intermediate phase. MFRDS is a robust tool to explain and predict the possible precipitation products from various solutions of small organic molecules.

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Explanation for the selective crystallization from inosine solutions using mid-frequency Raman difference spectra analysis

Hypoxanthine is the doping component in anhydrous guanine β (AG β) biominerals. In this work, hypoxanthine was doped into all the reported guanine phases by solution methods. N7-hypoxanthine was doped...

Solid-State Separation of Hypoxanthine Tautomers through Doping Strategy

Amorphous simvastatin (amorphous SIM) and Form I of SIM were prepared separately from SIM acetone (AC)/ethyl acetate (ETAC)/ethanol (ET) solutions by simply controlling the solvent evaporation rate, and the kinetic formation of amorphous SIM from SIM AC/ETAC/ET solutions was explained using mid-frequency Raman difference spectra analysis. The mid-frequency Raman difference spectra analysis results indicate that the amorphous phase has close connections with solutions and might be the bridge, playing an important role in the intermediate phase, between solutions and their outcome polymorphs. Graphical Abstract This is a visual representation of the abstract.

Evaporative Crystallization of Simvastatin from Different Solutions Using Mid-Frequency Raman Difference Spectra Explanations

Explanation and Prediction for the Crystallized Products from Amorphous Bicalutamide and Bicalutamide Solutions by Using Mid-Frequency Raman Difference Spectra

Feng-Tai Chen

Papers

Novel nickel(II) and copper(II) complexes with phenoxy-imidazole ligands: Syntheses, crystal structures and norbornene addition polymerization

Explanation for the selective crystallization from inosine solutions using mid-frequency Raman difference spectra analysis

Solid-State Separation of Hypoxanthine Tautomers through Doping Strategy

Evaporative Crystallization of Simvastatin from Different Solutions Using Mid-Frequency Raman Difference Spectra Explanations

Explanation and Prediction for the Crystallized Products from Amorphous Bicalutamide and Bicalutamide Solutions by Using Mid-Frequency Raman Difference Spectra