36 results about "Cyclopentadienyl complex" patented technology

Catalyst compositions comprising a first metallocene compound, a second metallocene compound, an activator-support, and an organoaluminum compound are provided. An improved method for preparing cyclopentadienyl complexes used to produce polyolefins is also provided.

Metal source containing precursor liquid solutions for chemical vapor deposition processes, including atomic layer deposition, for fabricating conformal metal-containing films on substrates are described. More specifically, the metal source precursor liquid solutions are comprised of (i) at least one metal complex selected from β-diketonates, β-ketoiminates, β-diiminates, alkyl metal, metal carbonyl, alkyl metal carbonyl, aryl metal, aryl metal carbonyl, cyclopentadienyl metal, cyclopentadienyl metal isonitrile, cyclopentadienyl metal nitrile, cyclopentadienyl metal carbonyl, metal alkoxide, metal ether alkoxide, and metal amides wherein the ligand can be monodentate, bidentate and multidentate coordinating to the metal atom and the metal is selected from group 2 to 14 elements, and (ii) a solvent selected from organic amides including linear amides and cyclic amides for such metal source containing precursors.

The invention provides a positive resist composition, wherein a polymer compound having the weight-average molecular weight in the range of 1,000 to 500,000 and comprising a repeating unit having a hydrogen atom in a carboxyl group and/or in a phenolic hydroxy group therein been substituted by an acid-labile group and a repeating unit “a” having a cyclopentadienyl complex shown by the following general formula (1) is used as a base resin therein. There can be a positive resist composition having not only small edge roughness (LER and LWR) while having a higher resolution than conventional positive resist compositions, but also a good pattern form after exposure and an extremely high etching resistance, especially a positive resist composition using a polymer compound suitable as a base resin for a chemically amplifying resist composition; and a patterning process.

The present invention describes a metal precursor solution and metal source containing precursor liquid solutions for chemical vapor deposition processes, including atomic layer deposition, for fabricating conformal metal-containing films on substrates. More specifically, the metal source precursor liquid solutions are comprised of (i) at least one metal complex selected from -diketonates, -ketoiminates, -diiminates, alkyl metal, metal carbonyl, alkyl metal carbonyl, aryl metal, aryl metal carbonyl, cyclopentadienyl metal, cyclopentadienyl metal isonitrile, cyclopentadienyl metal nitrile, cyclopentadienyl metal carbonyl, metal alkoxide, metal ether alkoxide, and metal amides wherein the ligand can be monodentate, bidentate and multidentate coordinating to the metal atom and the metal is selected from group 2 to 14 elements, and (ii) a solvent selected from organic amides including linear amides and cyclic amides for such metal source containing precursors.

Catalysts useful for polymerizing olefins are disclosed. The catalysts comprise an activator and a bridged cyclopentadienyl complex that incorporates a monoanionic hydroxylamido or hydrazido ligand fragment. Suitable complexes have the structure:

wherein M is a Group 4 metal; Z is a divalent linking group; X is N or O; each of R¹ and R² is independently C₁-C₄ alkyl or C₆-C₁₀ aryl; R¹ and R² can be joined together; n is 0 when X is O, and n is 1 when X is N; each Y is independently halide, alkyl, dialkylamido, aryl, or aralkyl. A modeling approach is used to identify particular valuable complexes, each of which incorporates a readily synthesized cyclopentadienyl precursor.

The present invention provides an organic compound for CVD raw material prepared by mixing a first organometallic compound and at least one second organometallic compound, said first organometallic compound having a central metal atom and at least one ligand coordinated thereto and said second organic compound having the same central metal as that of the first organometallic compound and at least one different ligand coordinated thereto from the ligand of the first organometallic compound, wherein the first and second organometallic compounds differ in decomposition behavior. In particular, a CVD raw material having both easy handling and good adhesiveness to thin film, which have not been so far sufficiently compatible with each other, can be obtained by mixing a cyclopentadienyl complex or a derivative thereof as the first organometallic compound, and a β-diketonato compound as the second organometallic compound.

The present invention relates to a new optically active rare earth complex (1) represented by a general formula (1);

(in the formula, X₁ and X₂ each independently represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 4 carbon atoms or an alkoxyl group having 1 to 4 carbon atoms; Y₁, Y₂, Y₃, and Y₄, each independently represents a hydrogen atom, a halogen atom, or an alkyl group having 1 to 4 carbon atoms; R₁ represents an alkyl group having 1 to 8 carbon atoms, a fluorine-substituted alkyl group having 1 to 8 carbon atoms, or a phenyl group: R₂ is a group selected from the group consisting of (a) cyclopentadienyl groups, (b) phenyl groups, and (c) naphthyl groups).

The invention discloses a controllable preparation method of a carboxyl functionalized carbon nanotube. The highest carboxyl concentration can reach 3.45nmol/cm<2> and can be randomly adjusted by changing the proportion of reactants. The method comprises the following concrete steps: weighing a cyclopentadienyl complex and carboxyl derivatives of the cyclopentadienyl complex; dissolving in an organic solvent; hermetically heating; filtering; washing; drying in vacuum and the like. The carboxyl modified carbon nanotube prepared by adopting the method is relatively high in purity and uniform in tube diameter distribution, and both the specific surface area and the carbon nanotube surface carboxyl concentration of the carboxyl modified carbon nanotube greatly exceed those of a carbon nanotube treated with a strong oxidant. The method for preparing the carboxyl modified carbon nanotube is low in energy consumption, high in efficiency, free of an additional catalyst and easy and feasible; raw materials are simple and easily available; the carboxyl modified carbon nanotube can be subjected to large-scale continuous production and is easy for large-scale production and suitable for industrialized production.

Disclosed are novel cyclopentadienyl transition metal compounds that are stable under a wide variety of conditions, particularly under conditions that include exposure to water and oxygen containing media. These novel compounds can be utilized in preparing novel catalyst systems useful in polymerizing olefins. The cyclopentadienyl compound can specifically be [(C5H4CH2CH2N[H]Me2)TiCl3]+B[C6F5]4-. Also disclosed are processes for preparing the novel cyclopentadienyl transition metal compounds.

A catalytic system based at least on a preformation monomer selected from the group consisting of 1,3-dienes, ethylene, α-monoolefins and their mixtures, on a metallocene of formula {P(Cp)(Flu)LnG} and on an organometallic compound as cocatalyst is provided. In the formula, Ln denotes a metal atom which is a rare earth metal, G denotes a group comprising the borohydride BH₄ unit or denotes a halogen atom X selected from the group consisting of chlorine, fluorine, bromine and iodine, Cp denotes a cyclopentadienyl group of formula C₅H₄, Flu denotes a fluorenyl group of formula C₁₃H₈, P being a group bridging the two Cp and Flu groups and comprising a silicon or carbon atom. Such a catalytic system exhibits an improved stability of the catalytic activity over time, in particular on storage.

A hydrosilylation iron catalyst prepared from a two-electron ligand (L) and a mononuclear, binuclear, or trinuclear complex of iron indicated by formula (1), Fe having bonds with carbon atoms included in X and the total number of Fe-carbon bonds being 2-10. As a result of using iron, the hydrosilylation iron catalyst is advantageous from a cost perspective as well as being easily synthesized. Hydrosilylation reactions can be promoted under mild conditions by using this catalyst.

Fe(X)_a  (1)

(in the formula, each X independently indicates a C2-30 ligand that may include an unsaturated group excluding carbonyl groups (CO groups) and cyclopentadienyl groups, however at least one X includes an unsaturated group, a indicates an integer of 2-4 per Fe atom.)

Catalytic composition effective in the hydrogenation of olefinic double bonds prepared by reaction between:(A) at least one cyclopentadienyl complex of a transition metal having general formula (I) (R)(R1)M1(R2)(R3) wherein R is an anion containing an eta5-cyclopentadienyl ring coordinated to M1; M1 is selected from titanium, zirconium and hafnium; R2 and R3, the same or different, are organic or inorganic anion groups bound to M1; R1 is selected from cyclopentadienyl and R2;(B) an alkylating composition essentially consisting of:(b1) an organometallic compound having general formula (II) M2 (R4)(R5), wherein M2 is selected from Zn and Mg;(b2) an organoderivative of aluminum having general formula (III) Al(R6)3.

The invention relates to an asymmetrical iridium (III) phosphorescent complex containing a dibenzo-phosphorus mixed with cyclopentadienyl group, and a synthesis method of the asymmetrical iridium (III) phosphorescent complex. The synthesis method comprises the steps of synthesizing a ligand L-PO by taking 2-phenylpyridine and p-bromophenyl boronic acid as raw materials, and carrying out a Suzuki coupling reaction to synthesize 2-(4-bromophenyl) pyridine; enabling the 2-(4-bromophenyl) pyridine to have a reaction with n-butyl lithium and trimethyl borate to generate 4-(2-pyridyl) phenyl boronic acid; enabling the 4-(2-pyridyl) phenyl boronic acid to have a reaction with o-dibromobenzene for carrying out Suzuki coupling to generate a pyridine derivative having a 2-bromobiphenyl structure; enabling a Grignard reagent of the compound to have a reaction with dichlorophenyl phosphine, and carrying out a ring closing reaction under a catalytic condition of palladium acetate to obtain the ligand L-PO containing the dibenzo-phosphorus mixed with cyclopentadienyl group. The asymmetrical iridium (III) phosphorescent complex containing the dibenzo-phosphorus mixed with cyclopentadienyl group has excellent electron injection/transmission performance, and can remarkably improve the electroluminescence efficiency of an organic electroluminescence device based on the materials.

The invention relates to a preparation method of a substituted cyclopentadienyl metallocene compound. The preparation method comprises the following steps that a cyclopentadienyl compound and an aldehyde-ketone compound are adopted to carry out reaction to produce a fulvene compound, then the fulvene compound is acted with metal hydride to produce substituted cyclopentadienyl salt, and the substituted cyclopentadienyl salt is further reacted with group IV metal halide to produce the metallocene compound. Compared with the prior art, the preparation method has the advantages of high product yield, convenience in operation, good economy and the like and is suitable for industrial production.