in pentane at 20°C;

in tetrahydrofuran Zr complex dissolved in THF; Ph2SbCl3 (1 equiv.) added at room temp.; stirred; volatiles removed in vac.; crystd. from hexane at 5°C (Ph2SbCl); detd. by single crystal X-ray diffraction;

in tetrahydrofuran in foil wrapped tube; Zr complex and MeN(CO)2CHCH (1 equiv.) dissolved in THF; Ph2SbCl3 (1 equiv.) added; stirred for 3 h; crystd. from hexane at 5°C (Ph2SbCl); detd. by single crystal X-ray diffraction;

in tetrahydrofuran Zr complex dissolved in THF; Ph2SbCl3 (1 equiv.) added at room temp.; stirred; volatiles removed in vac.; crystd. from hexane at 5°C (Ph2SbCl); detd. by single crystal X-ray diffraction;

in tetrahydrofuran in foil wrapped tube; Zr complex and MeN(CO)2CHCH (1 equiv.) dissolved in THF; Ph2SbCl3 (1 equiv.) added; stirred for 3 h; crystd. from hexane at 5°C (Ph2SbCl); detd. by single crystal X-ray diffraction;