in carbon disulfide decompn. in the course of 12 h observed by (77)Se-NMR; not isolated;

in neat (no solvent) sample is heated to 51°C, kept at this temp. for 1 min and quenched to 20°C; extn. with CS2, HPLC analysis;

in carbon disulfide; acetonitrile soln. of Cp2TiS5/CS2 added to soln. of SeBr2/acetonitrile (made from SeBr4 and Se in acetonitrile) at 20°C, stirred 15 min; further products (from HPLC); ppt. isolated (=Cp2TiBr and traces 6-,7-,8-membered rings (IR, HPLC anal.)), filtrate cooled, extd., contg. Cp2TiBr2, Se(n)S(8-n) and Se(x)S(12-x) (HPLC anal., Raman spect.);

in carbon disulfide; acetonitrile soln. of Cp2TiS5/CS2 added to soln. of SeBr2/acetonitrile (made from SeBr4 and Se in acetonitrile) at 20°C, stirred 15 min; further products (from HPLC); ppt. isolated (=Cp2TiBr and traces 6-,7-,8-membered rings (IR, HPLC anal.)), filtrate cooled, extd., contg. Cp2TiBr2, Se(n)S(8-n) and Se(x)S(12-x) (HPLC anal., Raman spect.);

in carbon disulfide addn. of equimolar mixture of S2Cl2 and Se2Cl2 to a soln. of Cp2TiS5 at 20°C in diffuse daylight with stirring; after 5 min dilution to 50 cm**3 with CS2; HPLC;