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The preparation and properties of cationic dicarbonylcyclopentadienyliron complexes of organic carbonyl compounds: molecular structure of dicarbonylcyclopentadienyliron(3-methylcyclohexenone) hexafluorophosphate

Authors
Journal
Journal of Organometallic Chemistry
0022-328X
Publisher
Elsevier
Publication Date
Volume
187
Issue
2
Identifiers
DOI: 10.1016/s0022-328x(00)81794-5

Abstract

Abstract A number of complexes CpFe(CO) 2(L) (L = aldehyde, ketone, ester, amide) have been prepared either by treatment of [CpFe(CO) 2] 2 or CpFe(Co) 2Br with AgPF 6 in the presence of L or by a ligand exchange reaction employing CpFe(CO) 2(isobutylene)BF 4. NMR spectral data suggest that these complexes involve iron—oxygen σ-bonding rather than π-bonding to the carbonyl group. This is confirmed by an X-ray structure determination of the 3-methylcyclohexenone complex. The exchange stability of these complexes parallels their basicity.

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