carbon disulfide in pentane dry N2-atmosphere; addn. of excess CS2 to V-compd. (room temp.), stirring for 12 h (pptn.); collection (filtration), drying (reduced pressure); elem. anal.;

in pentane dry N2-atmosphere; addn. of slight excess of EtSH to V-compd. (-20°C), stirring for 1 h; collection (filtration), washing (pentane), drying (reduced pressure); elem. anal.;

in pentane byproducts: HNEt2; dry N2-atmosphere; addn. of excess i-PrOH to V-compd. (0°C), stirring for 10 min; solvent removal (reduced pressure);