bromine in tetrachloromethane byproducts: CoBr2; under N2 a soln. of Co-complex in CCl4 was treated with a soln. of Br2 in CCl4 at room temp. for 2 h; monitored by IR, pumped off, extd. with n-pentane, evapd.;

hydrogenchloride in diethyl ether under N2 a soln. of Co-complex in ether was stirred for 2 d at room temp. with excess of LiAlH4, hydrolysis with aq. HCl; chromd. (silica gel, hexane/benzene);

aluminium trichloride in diethyl ether under N2 a soln. of Co-complex in ether was treated with AlCl3 for 8 d; monitored by IR, pumped off;

aluminium trichloride in diethyl ether under N2 a soln. of Co-complex in ether was treated with AlCl3 for 8 d; monitored by IR, pumped off;