Question

II. Calculate the AH (in keal/mol) for the first step of propagation for the two types of hydrogen atoms in 2- methylpropane using the chlorine radical. Draw the energy diagram (including both possibilities on the same diagram) and indicate whether the first step of propagation is endothermic or exothermic. ALSO calculate the AHn for the formation of the product resulting from the more easily abstractable hydrogen. (Remember: you need to have three AH values calculated and ONE energy diagram). (20 points)

Answer 1

Solution - Chlorination of alkane via radiled mechanism *** 14c- chat it has alyses & hydragan, le- an 3² Carnbarn de and" cubor. Hona will gius methyl propane 2 radical Protermediates on Chennafem forces - fishatián a no, cinc Boogagalan 10c - HU CHE miny i je testing. y en to ch ich of her I free radical Buminat win frommet formation - g a-ch o cy-chech (least fouduct as I tylengers ī d ers noticebat easily cty-co c (ham canly abstracted &- chl Hydongen) dy (more shable fredsed, major CH-C- Chyt cu - cg. - Nowy energy diagram (cycl-cy) Ale 1 free radical Tl Norime ferile celory) () indlud femetin forma se see ndical. methyl supane Propagation sy't step is endothemed as oH for Propagation is positive Joe Rree radical more stable due to its effect of methyl groups increases groups increases colechon alernity in of pee radical & make it stable CamScanner