(Butadiene)iron tricarbonyl is an organoiron compound with the formula (CH)Fe(CO). This coordination complex is a well-studied simple example of a (diene)iron tricarbonyl complex. An orange-colored viscous liquid that freezes just below room temperature, the compound adopts a piano stool structure.
Synthesis and reactivity The complex was first prepared by heating iron pentacarbonyl with the diene.
Protonation of the title complex with hydrogen chloride gives (allyl)Fe(CO)3Cl.
Related compounds Iron(0) complexes of conjugated dienes have been extensively studied. In the butadiene series, (η-CH)Fe(CO) and (η:η-CH)(Fe(CO)) have been crystallized. Many related complexes are known for substituted butadienes and related species. The species (η-isoprene)iron tricarbonyl is chiral.
See also Cyclobutadieneiron tricarbonyl
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