in neat (no solvent) heated in a sealed tube at 250°C for 14 h; thianthrene was extd. with petroleum ether and analysed by mass-spectrometry;

in neat (no solvent) byproducts: mercury, hexaphenylene; finely powdered Bi intimately mixed with (HgC6H4)3 was heated in a sealed tube at 250°C for 2 h; extd. with petroleum ether, ext. was subjected to preparative TLC on SiO2 (petroleum ether-Et2O); products were identified by mass spectrometry;