NaOH in methanol; benzene Ar-atmosphere; stirring CoCl2 with 2 equiv. of glyoxime and 2.1 equiv. NaOH (in MeOH) for 10 min, addn. of 1 equiv. of pyridine derivative, stirring for 30 min, addn. of 1 equiv. of sulfide (in C6H6), stirring (room temp., 5 h); filtration (celite), evapn., extn. into CH2Cl2, drying (Na2SO4), solventremoval, chromy. (Florisil, CH2Cl2), crystn. on diffusion of hexane int o soln.; elem. anal.;