Abstract
The complex (1) was obtained by reduction of FeCl2[P(CH2CH2CH2PMe2)3] with lithium dust in tetrahydrofuran at room temperature. Although an equilibrium of 1 with its iron(0) tautomer Fe[P(CH2CH2CH2PMe2)3] could not be detected by NMR spectroscopy, the coordinatively unsaturated 16e-fragment could be trapped by ligands favouring low oxidation states: trimethyl phosphite reacted with 1 to give Fe[P(OMe)3][P(CH2CH2CH2PMe2)3] (2), whereas carbon monoxide was observed to add to the metal(O) species to yield a mixture of Fe(CO)[P(CH2CH2CH2PMe2)3] (3) and -(CH2)3-PMe2 (4). 1 was completely unreactive towards dihydrogen and dinitrogen, not, however, towards carbon dioxide, which was found to insert into both the Fe-H and Fe-C bond producing (5). Methyl and benzyl iodide interacted with 1 to give the iodo derivative (6). The reaction of 1 with methanol lead to FeH2[P(CH2CH2CH2PMe2)3] (7).
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