Tris(oxalato)phosphorus acid and its lithium salt.
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.
Wietelmann
Ulrich
U
Chemetall GmbH, Trakehner Strasse 3, 60487 Frankfurt, Germany.
Bonrath
Werner
W
Netscher
Thomas
T
Nöth
Heinrich
H
Panitz
Jan-Christoph
JC
Wohlfahrt-Mehrens
Margret
M