Abstract
The rate of CO insertion for the following complexes have been determined: RCH 2Mn(CO) 5 where R cyclohexyl, hydrogen, phenyl, methoxy, and carboxyl; RCH 2Fe(CO) 4 − where R cyclohexyl, n-octyl, n-heptyl, and phenyl. It appears that a Taft σϱ correlation can be established for this reaction. Rate data for the decarbonylation reaction of an analogous series of substituted manganese carbonyl complexes (RCH 2COMn(CO) 5) was also obtained. As in the case of the CO insertion reaction, the rates increase as the Taft σ for RCH 2 decreases. The linear free energy relationships (LFER) generated in this study have been used to predict the relative probability of several reaction steps that have been postulated for the conversion of carbon monoxide and hydrogen into ethylene glycol.
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