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Dialkyl cobalt catalysts and their use for hydrosilylation and dehydrogenative silylation

A technology of hydrosilylation and silyl hydride, which is applied in the direction of physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, catalytic reactions, etc., and can solve problems such as loss, aggregation or condensation, and low activity

Inactive Publication Date: 2017-03-22
MOMENTIVE PERFORMANCE MATERIALS INC +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Furthermore, many industrially important homogeneous metal catalysts suffer from the disadvantage that the catalytically active metal is lost to aggregation or agglomeration as the first charge of substrate is consumed, and its beneficial catalytic performance is greatly reduced by gel formation or precipitation
This is an expensive loss, especially for precious metals such as platinum
Heterogeneous catalysts are used to alleviate this problem, but have limited application to polymers and also have lower activity than their homogeneous counterparts

Method used

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  • Dialkyl cobalt catalysts and their use for hydrosilylation and dehydrogenative silylation
  • Dialkyl cobalt catalysts and their use for hydrosilylation and dehydrogenative silylation
  • Dialkyl cobalt catalysts and their use for hydrosilylation and dehydrogenative silylation

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Embodiment

[0070] General

[0071] All air and moisture sensitive manipulations were performed using standard Schlenk techniques or in an MBraun inert atmosphere drybox with a pure nitrogen atmosphere. Solvents for air- and moisture-sensitive operations are dried and deoxygenated by passing through the solvent system column and used Molecular sieves are stored in a dry box. Benzene-d 6 purchased from Cambridge Isotope Laboratories, dried over sodium and used Molecular sieves are stored in a dry box. The substrate was prepared in LiAlH before use 4 or CaH 2 Dry and degas under high vacuum.

[0072] NMR spectra were acquired on a Varian INOVA-500 or Bruker-500 MHz spectrometer. 1 Chemical shifts (δ) of H NMR spectra are given in parts per million and are referenced to benzene-d 6 (7.16ppm) or residual H-signal of chloroform-d (7.24ppm).

[0073] Me Synthesis of APDI ligand

[0074]

[0075] Diacetylpyridine (4 g, 24.5 mmol) was weighed into a thick-walled glass container,...

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Abstract

Disclosed herein are dialkyi cobalt complexes containing pyridine di-imine ligands and their use as catalysts for hydrosilylation, dehydrogenative silytation, and / or crosslinking processes. The present invention provides dialkyi cobalt complexes. More specifically, the invention provides dialkyt cobalt pyridine diimine complexes substituted with alkyl or alkoxy groups on the imine nitrogen atoms. The cobalt complexes can be used as catalysts for hydrosilylation and / or dehydrogenative silylation processes.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application Serial No. 61 / 990,435, filed May 8, 2014, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates generally to transition metal-containing compounds, and more particularly to dialkylcobalt complexes containing pyridinediimine ligands and their use as catalysts for hydrosilylation and dehydrosilylation reactions. Background technique [0004] Hydrosilylation chemistry, typically involving the reaction between silyl hydrides and unsaturated organic groups, is the basis for the preparation of commercial silicone-based products such as silicone surfactants, silicone fluids, and silanes as well as many additional cures Basis for synthetic routes to products such as sealants, adhesives and coatings. A typical hydrosilylation reaction uses a noble metal catalyst to catalyze the addition of a silyl-hydri...

Claims

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Application Information

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IPC IPC(8): B01J31/22
CPCC07F7/1876B01J31/1608B01J31/1815B01J2231/323B01J2231/766B01J2531/0244B01J2531/845C07F7/0829Y02P20/582
Inventor 刁天宁保罗·奇里克阿罗波·罗伊约翰尼斯·代利斯肯里克·路易斯
Owner MOMENTIVE PERFORMANCE MATERIALS INC
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