in toluene Ar or N2 atmosphere; 100 molequiv. of S8, stirring (room temp., 1h), pptn.; crystn. of Cr2(cp)2(CO)4S from mother-liqour; NMR-, IR- and mas spectroscopy;

in toluene Ar or N2 atmosphere; 31.3 molequiv. of S8, stirring (room temp., 3 h), removal of excess of S8 (filtration); further products; conc., crystn. on cooling, mixt. (not sepn., mas spectroscopy), further conc. of mother-liqour and cooling (-30°C), mixt. (not sepn., mas spectroscopy), crystn. on hexane adnn. to mother liqour and cooling (-30°C, overnight); t.l.c.;