in neat (no solvent) mixt. heated at 150°C for 15 h in a sealed evacuated ampoule; volatiles removed (vac., 100°C) and collected in a trap, residue treated with heptane, cooled to -5°C (crystn.);

in neat (no solvent) byproducts: (C2H5)2PbCl2, (C2H5)4Pb; mixt. heated at 150°C for 15 h in a sealed evacuated ampoule; volatiles removed (vac., 100°C) and collected in a trap, residue treated with heptane, cooled to -5°C (crystn.);

in water; acetone byproducts: saccharin; refluxed in 1:1 mixt. of solvents;