Zinc Halide Catalyst for Aliphatic Amine Dehydrocoupling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for dehydrocoupling reactions are limited in their ability to effectively couple aliphatic amines and hydridosilanes or amines and inorganic perhydridosilanes, as they are not as efficient as those for aromatic amines and hydridosilanes.
Innovation Solution
The method involves contacting aliphatic amines or perhydridosilanes with a catalyst ZnX2, where X is alkyl, chloride, bromide, iodide, trifluoromethanesulfonate, bis(trifluoromethane)sulfonamide, tosylate, methanesulfonate, or O3S(CF2)xCF3, under specific temperature and pressure conditions to facilitate dehydrocoupling reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional catalysts are used for dehydrocoupling reactions, then aromatic amines and hydridosilanes can be effectively coupled, but aliphatic amines and hydridosilanes or perhydridosilanes cannot be efficiently coupled
Solution Approach 1:
The patent changes the catalyst parameters by using zinc halides (ZnCl2, ZnBr2, ZnI2) instead of conventional catalysts, and optimizes reaction conditions including temperature (60-150°C), solvent selection (THF, toluene, dichloromethane), and molar ratios to enable efficient dehydrocoupling of aliphatic amines with hydridosilanes and perhydridosilanes
Solution Approach 2:
The zinc halide catalyst acts as an intermediary that facilitates the dehydrocoupling reaction between aliphatic amines and silanes, enabling the reaction to proceed through a viable mechanism that involves zinc-amine complex formation and subsequent silicon-nitrogen bond formation
2Reliability
If dehydrocoupling reactions are performed under mild conditions, then reaction selectivity is improved, but reaction rate decreases
Solution Approach 1:
The patent optimizes reaction parameters including temperature (60-150°C), catalyst loading (5-20 mol%), and reaction time (2-24 hours) to achieve a balance between selectivity and reaction rate, with the zinc halide catalyst enabling reactions to proceed efficiently under controlled conditions
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables successful dehydrocoupling of aliphatic amines and silanes or perhydridosilanes, producing usable silicon-containing films that can be deposited on substrates through various deposition techniques, enhancing the versatility of silicon-heteroatom film formation.
Implementation Method 1
The present invention provides a method for dehydrocoupling silanes and amines. The method comprises contacting: (a) an aliphatic amine; (b) a silane; and (c) a catalyst which is ZnX2
Data Source
AI summary
A method for dehydrocoupling silanes and amines. The method comprises contacting: (a) an aliphatic amine; (b) a silane; and (c) a catalyst which is ZnX2, wherein X is alkyl, chloride, bromide, iodide, trifluoromethanesulfonate, bis(trifluoromethane)sulfonamide, tosylate, methanesulfonate or O3S(CF2)XCF3 wherein x is an integer from 1 to 10.