title: Tris(oxalato)phosphorus acid and its lithium salt.
abstract: The conversion of three equivalents of anhydrous oxalic acid with phosphorus pentachloride yields tris(oxalato)phosphorus acid 1, which crystallizes from diethyl ether solutions as protonated diethyl ether complex [(Et2O)2H](+)[P(C2O3)3)]-. The superacidic compound can be used as catalyst for Friedel-Crafts-type reactions. Upon neutralization with lithium hydride, the lithium salt Li[P(C2O3)3] 2 is obtained, which is highly soluble in aprotic solvents and which exhibits a wide voltage window. Thus, the lithium compound is a promising candidate as electrolyte for high performance non-aqueous batteries.
authors.affiliation: Chemetall GmbH, Trakehner Strasse 3, 60487 Frankfurt, Germany.
authors.forename: Ulrich
authors.initials: U
authors.lastname: Wietelmann
authors.forename: Werner
authors.initials: W
authors.lastname: Bonrath
authors.forename: Thomas
authors.initials: T
authors.lastname: Netscher
authors.forename: Heinrich
authors.initials: H
authors.lastname: Nöth
authors.forename: Jan-Christoph
authors.initials: JC
authors.lastname: Panitz
authors.forename: Margret
authors.initials: M
authors.lastname: Wohlfahrt-Mehrens