in deuterated toluene (exclusion of air and moisture), mixt. of Al-Fe complex, Me3Al(py) and Me3Al dissolved in toluene-d8, treated with (((C5H4)2Fe)3Al2(py)2, stirred for 20 h; centrifuged, evapd., washed (hexane);

in deuterated toluene (exclusion of air and moisture), pyridine (5 equiv.) added to mixt. of Fe-Al complex and Me3Al(py) in toluene-d8 at 0°C, stirred for 0.5; not isolated, detcd. by NMR;