The dimerization of thiophosgene and trichlorothioacetyl chloride S-imides – Head-to-head and/or head-to-tail?

It has been shown that certain N-aryltrichoromethanesulfenamides Cl3C−S−NHAr can be dehydrochlorinated to form red-colored thiocarbonyl S-imides CCl2=S=NAr which dimerize spontaneously. The dimers ...