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)5PPhEt2PF6 in THF under Ar at 22°C, react. time 200 min; not isolated; detected by IR and TLC;