摘要:
Catalyst compositions based on Ruthenium- or Osmium-based complex catalysts and specific co-catalysts are provided for selectively hydrogenating nitrile rubbers in the presence of such catalyst compositions.
摘要:
An object of the invention is to provide a method for producing a (meth)acrylate ester compound by the transesterification of an alkyl (meth) acrylate with an alcohol compound having a tertiary hydroxyl group so as to esterify all the hydroxyl groups present in the alcohol compound with a high yield or, in a preferred embodiment, a method for esterifying a polyhydric alcohol compound having a tertiary hydroxyl group and also having a primary hydroxyl group and/or a secondary hydroxyl group by one-pot transesterification into a (meth)acrylate ester compound of the polyhydric alcohol. The method for producing a (meth) acrylate ester compound includes a step (I) of transesterifying an alkyl (meth)acrylate with an alcohol compound having a tertiary hydroxyl group using a transesterification catalyst including a complex of iron with a specific ligand, the water content in the transesterification reaction system being not more than 1000 ppm.
摘要:
A catalyst including, as effective ingredient, complex represented by Formula (1) which contains bidentate ligand including aromatic heterocyclic 5-membered ring having 2 or more nitrogen atoms, or represented by Formula (2) which contains bidentate ligand including: aromatic heterocyclic 5-membered ring having 2 or more nitrogen atoms; and 6-membered ring having 1 or more nitrogen atoms, isomer or salt of the complex: where M 1 and M 2 denote transition metal such as iridium; X 1 to X 16 each independently denote nitrogen or carbon; R 1 to R 13 denote, for example, hydrogen atom, alkyl group, or hydroxy group, provided that when X i (where i denotes 13 to 16) is nitrogen, R i is absent at position corresponding to the nitrogen; L 1 and L 2 denote, for example, an aromatic anionic ligand; Z 1 and Z 2 denote any ligand or are absent; and m and n denote positive integer, 0, or negative integer.
摘要翻译:一种催化剂,其含有式(1)所示的络合物作为有效成分,该络合物含有包含具有2个以上氮原子的芳香族杂环五元环的二齿配体或式(2)所示的含有二齿配体的芳香族杂环5- 具有2个或更多个氮原子的六元环; 以及具有1个或多个氮原子的6元环,该配合物的异构体或盐:其中M 1和M 2表示过渡金属如铱; X 1至X 16各自独立地表示氮或碳; R 1〜R 13表示例如氢原子,烷基或羟基,条件是当X i(其中i表示13至16)为氮时,R i在对应于氮的位置不存在; L 1和L 2表示例如芳族阴离子配体; Z 1和Z 2表示任何配体或不存在; m和n表示正整数,0或负整数。
摘要:
There is provided a metalloporphyrin complex represented by general formula (1): wherein M is a metal; A 1 to A 4 are independently of each other a substituent represented by general formula (2): €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ-D-E X - €ƒ€ƒ€ƒ€ƒ€ƒ(2) wherein D is a divalent organic group having 1 to 20 carbon atoms; E + is a quaternary ammonium group or quaternary phosphonium group having 3 to 60 carbon atoms; and X is a halogen atom. There is thus provided a metalloporphyrin complex which, when used as a carbon dioxide fixation catalyst, exhibits high catalytic activity, has a small environmental burden and can be easily synthesized.
摘要:
Industrially relevant product selectivities and reaction rates are obtained from rhodium catalyzed hydroformylation of propylene via the use of a novel induction period in which the supramolecular ligand assembly, the rhodium precatalyst and an initial substrate are allowed to form a hydroformylation catalyst that is more selective toward branched aldehydes. Upon heating this incubated mixture and addition of propylene, iso- butyraldehyde is obtained in higher concentrations and rates that are otherwise unattainable.
摘要:
Disclosed is a composite formed by physical and chemical bonding of (a) a carbon nanotube (CNT); and (b) a metal complex with at least one kind of ligand coordinated to a central metal, the CNT being connected to the metal within the metal complex by a direct bond to the metal. Also, provided is a dispersant for a CNT containing a metal complex comprising (i) a complex ion with at least one kind of ligand (Ln) chemically bonded to a central metal; and (ii) a counter ion. By using a metal complex as a dispersant for a CNT, various characteristics possessed by the metal complex can be provided to the CNT, and the dispersibility of the CNT can be meaningfully increased by introducing a ligand and/or a counter ion having dispersion medium-affinitive properties.