KI in acetone byproducts: [(C5H5)Fe(C6H5)Sn(C6H5)2Cl)]PF6; ((C5H5)Fe(C6H5)Sn(C6H5)3)PF6 in acetone is added to HgCl2 in acetone; refluxed briefly; cooled to -5°C, filtered off; filtrate added to a soln. of KI; excess HgCl2 removed; ppt. filtered off; elem. anal.; IR;