Hydrogenation of Ethene and Propene

It is convenient to treat these two molecules side-by-side because, they are the only ones with which addition and exchange are the only real possibilities. The preponderance of the literature concerns ethene, but where comparison can be made there is little to choose between the ways in which they behave, save for self-evident differences due to the numbers of carbon atoms. 

---

Fig. 18. Hydrogenation of ethene and propene by [IrH2(P Pr3)(NCMe)3] species.

---