in tetrahydrofuran (N2); addn. of the Mn complex at -90°C to the Fe compd. in THF with vigorous stirring, further stirring (-90 to -45°C, 4 h); evapn. to dryness (high vacuum, -45 to -40°C), chromy. (neutral alumina; light petroleum, then light petroleum/CH2Cl2; -25°C), collection, solvent removal (vac.), recrystn. (light petr. or light petr./CH2Cl2 at -80°C); elem. anal.;

carbon monoxide; hydrogen in tetrahydrofuran Kinetics; byproducts: N-methylpiperidine, ethanol, methane; a mixt. of Fe-complexes in THF was heated at 150°C under 245 atmof 3:1 CO/H2; at 190°C reaction was too fast to monitor;