tetrahydrofuran in tetrahydrofuran addn. of 5 mL of 1E-2 M NaMn(CO)5 in THF to 5 mL of 1E-2 M Mn(CO)5PPh3PF6 in THF under Ar at 22°C, react. time <5 min; not isolated; monitored by IR;

tetrahydrofuran in tetrahydrofuran in 10 mL of THF with 5E-3 M NaMn(CO)5 and 5E-3 M Mn(CO)5(PPh3)PF6 at 22°C under Ar, 0.10 mmol PEt3 added, react. complete within 5 min; further products;