hydrogenchloride in tetrahydrofuran mixing of CrPh2 with Li-salt in THF (molar ratio 1:1.5, -78°C, 1 h), rise of temp. to 25°C (over 1 h); gas liquid chromy. after quenching with 2 N HCl;

hydrogenchloride in tetrahydrofuran mixing of CrPh2 with Li-salt in THF (molar ratio 1:1.5, -78°C, 1 h), rise of temp. to 25°C (over 1 h); gas liquid chromy. after quenching with 2 N HCl;

in tetrahydrofuran 1.) -78 deg C, 1 h, 2.) -78 deg C to 25 deg C, 1 h;