Primary amines undergo chloromethylation with CH2O/SOCl2 to give RN(CH2Cl)(
2), which in turn react with Li-2[Fe2S2(CO)(6)] to give Fe-2[(SCH2)(2)NR](C
O)(6); in the case of R = CH2CH=CH2 and CH2CH2SMe, Me3NO-induced decarbonyl
ation afforded pentacarbonyl derivatives wherein the pendant functionality
is coordinated to Fe.