in tetrachloromethane
dropwise addn. of Pb2(C6H5)6 in CCl4 to stirred soln. of IN3 in CCl4 over a period of 15 min at -10°C; stirring at -10°C for 1 h; allowing to reach room temp.;; filtration; fractional crystn. on cooling; repeated recrystn.; m.p.; IR spectroscopy;;
