reaction employing CpFe(CO)2(isobutylene)BF4. 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.
已经通过在AgPF 6中用AgPF 6处理[CpFe(CO)2 ] 2或CpFe(Co)2 Br制备了许多配合物CpFe(CO)2(L)(L =醛,酮,酯,酰胺)。存在L或通过使用CpFe(CO)2(
异丁烯)BF 4的
配体交换反应。NMR光谱数据表明,这些络合物涉及
铁-氧的σ键而非羰基的π键。通过3-甲基
环己烯酮配合物的X射线结构测定证实了这一点。这些配合物的交换稳定性与它们的碱度平行。