Patent ID: 8436199

Claim:
A salt of formula (II) [B(R F ) 4-x-y (CN) x F y ] a − M a+ (II) where x=1, 2 or 3, y=0 or 1, x+y<4, a=1 or 2, and in which the ligands R F may be identical or different and R F stands for a perfluorinated or partially fluorinated C 1-12 -alkyl group and where the CN group is bonded to the B atom via the C atom, and M a+ is an alkali metal cation, a silver, magnesium, copper(I), copper(II), zinc(II) or calcium(II) cation or an organic cation, with the exception of K[B(CF 3 ) 3 CN] and [NH 4 ][B(CF 3 ) 3 CN].