Compreshension The first demontration of the stereochmistry the S_(N^(2)) reaction was carred out in 1935 by prof ,E,D Huges and his colleagues at the University of london , they allowed® -2-iodooctane to react with readioactiver iodide ion .^(I-). CH_(3)underset("2- iodooctane")underset(I)underset(|)(CH)(CH_(2))_(5)CH_(3)+^(*)I^(-)hArrCH_(3)underset("radioactive ") underset("2-iodooctane")underset(^(*))underset(|)(CH_(3))(CH_(2)_(5)Ch_(3)+I^(-) the rate of subsittuiton (rate constantK_(s) was determined by measuring the rate incoprotion of radioactvity into the alkyl halide the rate of loss of optical activity from the alky halide (rate constant K_(@)was alsodeterined under the same coditionsconsitions . what ratio K_(@)//K_(S) is prediected for each of hte following stereochemical scenarios : For inversion reaction : (A) (K_(@))/(K_(s))=1 (b) (K_(@))/(K_(S))lt1(c ) (K_(@))/(K_(s))gt1(d) can not be predicted B. For equal amounts of both retention and inversion ? (K_(@))/(K_(s))=1 (b) (K_(@))/(K_(S))lt1(c ) K_(@))/(K_(s))gt1(d) can not be predicted