When thienyl Schiff base 1 reacted with Fe 2 (CO) 9 under very mild conditions in benzene three major products were obtained: (1) a cyclometalated (μ-η 1:η 2 -thienyl; η 1:η 1 ( N ))hexacarbonyldiiron complex, 2, (2) a hexacarbonyldiiron complex with an organic ligand, which is composed of two thienyl moieties derived from the original thienyl imine and coupled together by a C−C bond, 3, and (3) a hydrogenation product of the original thienyl Schiff base. Molecular structures of compounds 2b and 3a have been determined by single-crystal X-ray diffraction.
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Wang et al. (1997) studied this question.
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