Stable Pentafluorosulfonolate Salt Preparation Without Toxic Gas Handling
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Solution Overview
Problem
The synthesis of pentafluorosulfanolate salts is challenging due to the instability of the SF5O- anion and the need for specialized equipment and reactive gases, limiting its application in medicinal, agrochemical, and material science.
Innovation Solution
A simple and reproducible process to generate stable pentafluorosulfonolate salts using accessible reactants and aprotic solvents, avoiding the use of toxic gases and specialized equipment, by reacting SF5X with inorganic bases and organic cations at room temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the conventional method using gaseous thionyl tetrafluoride (SO2F4) and toxic gases is employed, then pentafluorosulfonolate salts can be synthesized, but the process requires specialized equipment and handles hazardous materials
Solution Approach 1:
The patent replaces expensive, hazardous gaseous reagents with inexpensive, stable solid starting materials (SF5X compounds and inorganic bases) that can be handled in conventional laboratory settings without specialized equipment
Solution Approach 2:
The invention changes the physical state parameters of the reactants from gaseous (toxic SO2F4) to solid/stable forms (SF5X compounds), fundamentally altering the handling requirements and safety profile while maintaining the synthetic utility
2Ease of operation
If gaseous thionyl tetrafluoride is used as reagent, then the reaction can proceed, but specialized reactors and equipment are required
Solution Approach 1:
The patent eliminates the need for specialized gas-handling equipment by using conventional solid reagents that can be manipulated with standard laboratory glassware and techniques
Solution Approach 2:
The invention introduces stable solid SF5X compounds as intermediary reagents that deliver the SF5O- anion without requiring direct handling of gaseous thionyl tetrafluoride, thus mediating between the desired product and the constraints of conventional laboratory equipment
3Adaptability or versatility
If the SF5O- anion is generated using conventional methods, then it can be used for C-SF5 bond construction, but the anion stability is poor and applications are limited
Solution Approach 1:
The patent stabilizes the SF5O- anion by changing the counterion parameters and solvation conditions, enabling the anion to maintain stability while preserving its reactivity for diverse applications beyond C-SF5 bond construction
Solution Approach 2:
The invention expands the utility of SF5O- salts by demonstrating their applicability in multiple reaction types (nucleophilic substitutions, additions to unsaturated systems, metal coordination), transforming them from specialized reagents to versatile building blocks
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
The process yields stable SF5O- anions that are soluble and efficient as reagents for incorporating the SF5O- fragment into organic molecules, enhancing their application in various chemical reactions.
Implementation Method 1
reacting SF5X with inorganic bases and organic cations at room temperature
Implementation Method 2
The composition obtained in the process described in the first aspect is suitable for direct application as it possesses favourable solubility of the SF5O-
Data Source
AI summary
The present invention relates to a process for the preparation of pentafluorosulfonolate salts composition, the composition obtained in the process and its use. The composition comprising the pentafluorosulfonolate salts are useful for incorporating the pentafluorosulfanolate fragment into organic molecules using SFsO anionic species as reagents.