72024-82-9Relevant academic research and scientific papers
KINETICS AND MECHANISM OF MONOMOLECULAR HETEROLYSIS OF FRAMEWORK COMPOUNDS. IV. IONIZATION OF 1-ADAMANTYL IODIDE IN PROPYLENE CARBONATE
Ponomareva, E. A.,Tarasenko, P. V.,Yurchenko, A. G.,Dvorko, G. P.
, p. 702 - 709 (2007/10/02)
The heterolysis of 1-iodoadamantane in propylene carbonate was studied preparatively and kinetically; v = k , k25 = 2.50.10-8 sec-1, ΔH = 90.9 kJ/mole, ΔS = -85.5 J/mole°Additions of water, LiClO4, and Et4N+ClO4- increase and additions of Et4N+I-, LiBr, Et4N+Br-, Bu4N+Br-, Et4N+Cl-, LiPic, and Et4N+Pic- reduce the reaction rate.It is suggested that a sterically separated ion pair is formed in the rate-controlling stage and is quickly transformed into a solvent-separated ion pair, which then gives the reation products.The negative salt effect is due to the action of the salt on the sterically separated ion pair.
