Increasing the Brønsted acidity of Ph2PO2H by the Lewis acid B(C6F5)3. Formation of an eight-membered boraphosphinate ring [Ph2POB(C6F5)2O]2

Ralf Kather; Elena Rychagova; Paula Sanz Camacho; Sharon E Ashbrook; J Derek Woollins; Lars Robben; Enno Lork; Sergey Ketkov; Jens Beckmann

doi:10.1039/c6cc06102h

Increasing the Brønsted acidity of Ph2PO2H by the Lewis acid B(C6F5)3. Formation of an eight-membered boraphosphinate ring [Ph2POB(C6F5)2O]2

Chem Commun (Camb). 2016 Sep 21;52(73):10992-5. doi: 10.1039/c6cc06102h. Epub 2016 Aug 18.

Authors

Ralf Kather¹, Elena Rychagova, Paula Sanz Camacho, Sharon E Ashbrook, J Derek Woollins, Lars Robben, Enno Lork, Sergey Ketkov, Jens Beckmann

Affiliation

¹ Institut of Inorganic Chemistry and Crystallography, Bremen University, Leobener Straße, 28359 Bremen, Germany. [email protected].

PMID: 27538254
DOI: 10.1039/c6cc06102h

Abstract

Autoprotolysis of the metastable acid (C6F5)3BOPPh2OH, prepared in situ by the reaction of the rather weak Brønsted acid Ph2PO2H with the strong Lewis acid B(C6F5)3, gave rise to the formation of the eight-membered ring [Ph2POB(C6F5)2O]2 and C6F5H. The conjugate base was isolated as stable sodium crown ether salt [Na(15-crown-5)][Ph2PO2B(C6F5)3].