title: Increasing the Brønsted acidity of Ph2PO2H by the Lewis acid B(C6F5)3. Formation of an eight-membered boraphosphinate ring [Ph2POB(C6F5)2O]2.
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].
authors.affiliation: Institut of Inorganic Chemistry and Crystallography, Bremen University, Leobener Straße, 28359 Bremen, Germany. j.beckmann@uni-bremen.de.
authors.forename: Ralf
authors.initials: R
authors.lastname: Kather
authors.forename: Elena
authors.initials: E
authors.lastname: Rychagova
authors.forename: Paula
authors.initials: P
authors.lastname: Sanz Camacho
authors.forename: Sharon E
authors.initials: SE
authors.lastname: Ashbrook
authors.forename: J Derek
authors.initials: JD
authors.lastname: Woollins
authors.forename: Lars
authors.initials: L
authors.lastname: Robben
authors.forename: Enno
authors.initials: E
authors.lastname: Lork
authors.forename: Sergey
authors.initials: S
authors.lastname: Ketkov
authors.forename: Jens
authors.initials: J
authors.lastname: Beckmann