Cyclic Silane Dianion Salt Synthesis via Chelating Ligand
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Solution Overview
Problem
Current methods for synthesizing middle molecular weight silicon compounds, such as six-membered cyclic silicon compounds and their salts, are limited and not efficiently utilized due to their unique reactivity, and existing synthesis methods do not allow for high-yield production of stable cyclic silane dianion salts.
Innovation Solution
A method involving the reaction of halosilane compounds with phosphonium or ammonium salts and a chelating ligand, which facilitates the formation of cyclic silane compounds or salts with a specific structure, allowing for high-yield production and easy handling, as the resulting salts contain both silicon-halogen and silicon-hydrogen bonds, enabling versatile reactivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional tertiary polyamine is used for synthesizing cyclic silane dianion salt, then the synthesis can proceed, but the production yield is insufficient and the method is not efficiently utilized
Solution Approach 1:
The invention changes the chemical parameters by replacing the conventional tertiary polyamine with a specifically designed chelating ligand containing phosphinate or phosphonate groups. This parameter change in the reagent structure enables high-yield production of cyclic silane dianion salts, directly resolving the productivity issue while maintaining ease of manufacture through the ligand's chelating capability.
Solution Approach 2:
The chelating ligand acts as an intermediary that facilitates the reaction between halosilane and base, enabling the formation of cyclic silane dianion salt with high yield. The ligand's specific structure with phosphinate/phosphonate groups mediates the reaction process, improving both productivity and synthesis efficiency simultaneously.
2Ease of operation
If cyclic silane dianion salt is produced using existing methods, then the compound can be obtained, but the cation contains silicon atoms that generate silane gas upon decomposition, creating handling difficulties
Solution Approach 1:
The invention extracts silicon atoms from the cation component by using organic cations (phosphonium or ammonium salts) instead of silicon-containing cations. This removal of silicon from the cation eliminates the source of silane gas generation, making the product easier to handle without safety concerns, while the cyclic silane dianion structure is preserved.
Solution Approach 2:
The invention converts the potential harm of silane gas generation into a benefit by designing a cation that does not contain silicon. The organic cation from phosphonium or ammonium salts provides stability and ease of handling while eliminating the harmful silane gas decomposition product, transforming a safety issue into a handling advantage.
3Adaptability or versatility
If cyclic silane compound is synthesized, then the six-membered ring structure can be formed, but the reactivity is unique and limits the synthesis routes
Solution Approach 1:
The chelating ligand serves as a mediator that enables reliable synthesis of cyclic silane dianion salt while maintaining versatility. The ligand's specific structure with phosphinate or phosphonate groups facilitates the formation of the six-membered ring through a reliable mechanism, and the resulting product retains the unique reactivity needed for various applications.
Solution Approach 2:
The invention changes the reaction parameters by using a specifically designed chelating ligand that works with halosilane compounds to form cyclic structures reliably. This parameter change in the reagent system provides both reliable synthesis and maintains the adaptability of the cyclic silane product for various chemical transformations.
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 method enables the efficient production of cyclic silane compounds or salts with a high yield, providing a stable and versatile silicon-based material for various applications by using easily available phosphonium or ammonium salts and halosilane compounds, allowing for the introduction of silane structures into diverse compounds.
Implementation Method 1
a phosphonium salt or an ammonium salt and a chelating ligand having a specific structure (chelate forming agent) are concurrently used
Implementation Method 2
allowing a halosilane compound to react in the presence of at least one of a phosphonium salt and an ammonium salt
Implementation Method 3
whereby a cyclic silane compound or a salt thereof (novel cyclic silane dianion salt) can be efficiently obtained
Data Source
AI summary
An object of the present invention is to provide a production method that can efficiently produce a cyclic silane compound or a salt thereof with a high yield and to provide a novel salt having a cyclic silane dianion that is easy to handle and a cyclic silane dianion salt-containing composition. The method for producing a cyclic silane compound or a salt thereof of the present invention includes the step of allowing a halosilane compound to react in the presence of at least one of a phosphonium salt and an ammonium salt, and a compound represented by a specific formula.