Exchange between RhD and

Important mechanistic information on the hydroformylation reaction can be obtained by deuterium labeling studies. The outcome of these labeling studies, however, will be influenced if fast exchange between rhodium hydrides (or deuterides) 

The presence of small amounts of HRh(38)2(CO) could not be determined because of overlap with one of the absorptions of the deuteride complex. 

Logarithmic plot of the decay of the relative absorption at 2020 cm vs. time. Reproduced from Ref [55] with permission. 

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