in acetone mixt. (Zn(S2PPh2)2) and (NEt4)(OCOC17H35) in acetone refluxed for 24 h; ppt. (zinc stearate) filtered off, soln. allowed to stand at room temp.for 24 h, (NEt4)(Zn(S2PPh2)3) filtered off, mother-liquor evapd. in vacuo - (NEt4)(S2PPh2);