Preparation of bis(acetonitrile) palladium (II) p-toluenesulfonate (Pd(CH3CN)2(OTs)2:

To a clear dark orange solution of Pd(OAc)2 (0.33 g, 1.47 mmol) in acetonitrile (30 ml) a solution of
p-toluenesulfonic acid (1.5 g, 7.9 mmol) in acetonitrile (40 ml) was added dropwise with stirring.
The color gradually changed to pale yellow. Subsequently diethyl ether (50 ml) was added, and this
resulted in precipitation of fine pale yellow microcrystals. The suspension was set aside over night
and the supematent liquid was decanted. The crystals were washed with diethyl ether, dried under a
slight vacuum, and shown to be Pd(MeCN)2(OTs)2.

Reference: E. Drent; J. A. M. van Broekhoven; M. J. Doyle J. Organomet. Chem., 1991, 417, 235.