11. The purpose of this is to use the multiplication effect of the avalanche produced by each ion pair . 12. The accompanying plot shows the variation of ion pair generation with varying applied voltage for constant incident radiation. 13. Thionyl chloride first reacts with the alcohol to form an alkyl chloro sulfite, actually forming an intimate ion pair . 14. Electron spin resonance studies indicated the formation of Y 3 + and ( C 82 ) 3 " ion pairs . 15. The concept of intimate ion pairs is used to explain the slight tendency for inversion of stereochemistry during an SN1 reaction. 16. Most of the ion pairs just recombine immediately . Keenan Pepper 16 : 10, 8 July 2006 ( UTC) 17. For example, in acetonitrile both contact and solvent-shared ion pairs of Li ( NCS ) have been observed. 18. The addition of salt for example a tetraalkylammonium salt, prevents dissociation of the ion pair that is the propagating reactive site. 19. In concentrated solution, the additional HF causes the ion pair to dissociate with formation of the hydrogen-bonded hydrogen difluoride ion. 20. In the case of proportional counters, multiple creation of ion pairs occurs in the " ion drift " region near the cathode.
