Abstract

AbstractFrom theoretical considerations, it can be predicted that electron‐withdrawing substituents on an olefin will stabilize the π‐bond formed by the latter with zerovalent transition metals in complexes such as π‐olefin iron tetracarbonyl. In agreement with this iron tetracarbonyl complexes have been prepared with ligands such as maleic, fumaric, citraconic, acrylic, methacrylic and cinnarnic acids and their derivatives. The structures of these compounds have been confirmed by analytical, IR and NMR data.

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