in toluene under N2 or Ar, exclusion of oxygen and moisture, addn. of Me2HPS to a soln. of Co compound in toluene and dropwise addn. of (Et)(i-Pr)2N in toluene at 25°C during 2 h, 8 h; decantation, concd. in vac., addn. of n-hexane, decantation, cooled to -30°C, filtration of pptn., suspension in toluene, filtration (polymeric product), addn. of hexane to the filtrate, crystn. at -30°C; elem. anal.;