The rates of rearrangement of ten X-cinnamyl p-tolyl ethers were determined with the object of obtaining information to define the electronic character of the traiisition state of the Claisen rearrangement. The rates were best correlated by u+-constants and a p-value of-0.40. Since the rates of rearrangement of allyl PX-phenyl ethers are similarly correlated by negative p- and u+-constants, the transition state must involve a depletion of electrons in both the aryl ...
![Phenol,2-[1-(3-chlorophenyl)-2-propen-1-yl]-4-methyl结构式](https://image.chemsrc.com/caspic/300/93900-53-9.png)
![1-chloro-3-[3-(4-methylphenoxy)prop-1-enyl]benzene结构式](https://image.chemsrc.com/caspic/214/93900-55-1.png)
![Benzonitrile,4-[3-(4-methylphenoxy)-1-propen-1-yl]结构式](https://image.chemsrc.com/caspic/400/93315-24-3.png)
![Phenol,2-[1-(4-chlorophenyl)-2-propen-1-yl]-4-methyl结构式](https://image.chemsrc.com/caspic/267/58102-93-5.png)
