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Catalysis

Catalysis

The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.

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Updated: Jul 23, 2025

Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation

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Published on: July 18, 2017

(CAAC) Pd (py) 催化剂与Pd (CAAC) 不成比例

Nicola Marigo^1,2, Bernd Morgenstern¹, Andrea Biffis²

¹Coordination Chemistry, Saarland University, Campus C4.1, Saarbrücken D-66123, Germany.

Organometallics

|July 14, 2023

概括

使用循环 () () (氨基) 碳联体的新型类催化剂在布丘瓦尔德-哈特维格氨基化和烯形成中表现出高活性. 这些循环 (基) 和氨基) 碳化合物复合物是挑战交叉合反应的有效催化剂.

科学领域:

有机金属化学有机金属化学
催化剂是一种催化剂.
有机合成有机合成

背景情况:

与N-异环碳 (NHC) 连接体的合体是已确立的交叉合预催化剂.
在这些系统中,皮里丁作为一种常见的辅助连接体.

研究的目的:

为了研究含有循环 () 氨基) 碳 (CAAC) 连接体作为NHC连接体的替代品的复合体.
评估这些CAAC-复合体在交叉合反应和烯形成中的催化性能.

主要方法:

合成和表征含有CAAC和皮里丁连接体的复合物.
使用化的Buchwald-Hartwig氨化催化活性的评估.
在二氧化物存在的情况下,评估从anilin中形成diazene的催化性能.

主要成果:

减少的形式, (CAAC) Pd(py),不成比例地变成 (CAAC) 2 Pd0 和纳米粒子.
在60°C时,CAAC-复合物在化的Buchwald-Hartwig氨基化中表现出强大的催化活性.
在有氧条件下,这些复合物有效地催化了从anilin中产生diazene的形成.
交叉合中的催化活性可与NHC支持的复合物相比较,但CAAC复合物在烯合成方面表现出色.

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[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst

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Published on: July 18, 2017

Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-phosphinetriyltripiperidine]}palladium Under Mild Reaction Conditions

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结论:

循环 (基) ((氨基) 碳联体可以有效地取代预催化剂中的N-异环碳联体.
CAAC-合物复合物是布丘瓦尔德-哈特维格氨化和有氧迪亚形成的高效催化剂.
这些发现扩大了催化交叉合和相关转换的连接体的范围.