Mechanism of Formation of Grignard Reagents. Rate of Reaction of Cyclopentyl Bromide with a Rotating Disk of Magnesium

Article abstract of DOI:10.1021/ja00408a032

Careful studies of the dependence of the rate of reaction (k) of cyclopentyl bromide in diethyl ether with the surface of rotating disk as a function of the angular lelocity (ω) of the disk confirm the relation k * ω^1/2 expected for a mass-transfer limited reaction.More limited studies also indicate that the variations in this rate with other parameters are compatible with those expected for a mass-transfer limited reaction: k * (η)^-5/6(ρ)^1/6 (η is the shear viscosity of the solution and ρ is its density); k * D^2/3 (D is the diffusion coefficient of the alkyl halide).