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Non-Coordinated Phenolate Anions and Their Application in SF₆ Activation.

ABSTRACT: The reaction of the strong monophosphazene base with the weakly acidic phenol leads to the formation of a phenol-phenolate anion with a moderately strong hydrogen bond. Application of the more powerful tetraphosphazene base (Schwesinger base) renders the isolation of the corresponding salt with a free phenolate anion possible. This compound represents the first species featuring the free phenolate anion [H₅ C₆ -O]^- . The deprotonation of phenol derivatives with tetraphosphazene bases represents a great way for the clean preparation of salts featuring free phenolate anions and in addition allows the selective syntheses of hydrogen bonded phenol-phenolate salts. This work presents a phosphazenium phenolate salt with a redox potential of -0.72 V and its capability for the selective activation of the chemically inert greenhouse gas SF₆ . The performed two-electron reduction of SF₆ leads to phosphazenium pentafluorosulfanide ([SF₅ ]^- ) and fluoride salts.

SUBMITTER: Weitkamp RF

PROVIDER: S-EPMC8247349 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Non-Coordinated Phenolate Anions and Their Application in SF₆ Activation.

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Non-Coordinated Phenolate Anions and Their Application in SF₆ Activation.