Synclinal and Anticlinal Isomers of the Iron Methoxycarbene Complex 5-C5Me5)Fe(CO)2(=CHOMe)>(1+); Access to Functional Compounds

Article abstract of DOI:10.1039/c39860000894

The methoxymethyl complex (η⁵-C5Me5)Fe(CO)2(CH2OMe) (2) undergoes hydride abstraction with Ph3C(1+)PF6(1-) at -80 deg C and affords the secondary methoxycarbene complex <(η⁵-C5Me5)Fe(CO)2(=CHOMe)>(1+)PF6(1-) (1) as a mixture of two geometric isomers of which the syn form isomerizes upon warming; complex (1) adds PPh3 yielding quantitatively <(η⁵-C5Me5)Fe(CO)2(CHOMePPh3)>(1+)PF6(1-) (3), and converts Me2PhSiH into Me2PhSiCH2OMe (4), giving in the presence of the appropriate alkenes, the alkene complexes <(η⁵-C5Me5)Fe(CO)2(CH2=CHR)>(1+)PF6(1-) (5).

Full text of DOI:10.1039/c39860000894

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