200 Scientific Proceedings, Royal Dublin Society. 



Table 4. — Menschutkin's Experiments. 



Here, again, we see the great reactivity of methyl iodide and 

 the rapid fall of reactivity with increase of mass of the alkyl group 

 in the three lower homologues. 



Substantially the same results were obtained by Hecht, Conrad, 

 and Bruckner 1 in their study of ether-formation from the alkyl 

 iodides and sodium alcoholate in dry ethyl alcohol at 30°. 

 Williamson's reaction 



EI + Na • OEt = R • O • Et + Nal 

 was also found to obey the bimolecular velocity-equation ; and the 

 following table gives the relative reactivities as determined by the 

 velocity -coefficients (also referred to the reactivity of w-octyl iodide 

 as unity). 



Table 5. — Experiments of Hecht, Conrad, and 

 Bruckner. 



1 Zeit. fur Phys. Chem., vol. 4, p. 273. 



