The Reaction of Sulfur and Sulfur Compounds with Olefinic Substances. Part X. The Kinetics of the Reaction of Sulfur with Cyclohexene and Other Olefins
Abstract
As stated in Part VIII, the kinetic studies now reported are complementary to product studies described in Parts VIII and IX in a program of work aimed at elucidating the mechanism of sulfur-olefin interaction at about 140°. Attention has been given mainly to the reaction of sulfur with cyclohexene, because the latter is a relatively good solvent for sulfur, but reactions with 1-methylcyclohexene, oct-1-ene, hept-2-ene, 2-methylpent-2-ene, 2,6-dimethyloct-2-ene, and the 1,5-diene, 2,6-dimethylocta-2,6-diene, have also been examined. The rate of reaction increases until about 20% of the sulfur has reacted and then continues at an almost steady value until nearly all the sulfur is consumed. Further reaction between the product and excess of olefin proceeds at a diminishing rate. Kinetic analysis has been confined mainly to the period of accelerating rate (ra), and the information obtained appears to justify this procedure rather than considering the steady maximum rate (rm).