Solutions_Manual_for_Organic_Chemistry_6th_Ed 72

Solutions_Manual_for_Organic_Chemistry_6th_Ed 72 - 4- 1 7...

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Unformatted text preview: 4- 1 7 continued (b) Ma for the reAction is the sum oF the a vAlues of the indiviDuAl propAgAtion steps: + 3 8 kLmole + -83 kLmole = + 55 k/role (+ 33 kcAlmole + 20 kcAmole + 1 3 KcaVrole) (c IoiNtion of methAne is unfAVorAble for both KNetic And thermoDynAmic reAsons. ineticAlly, the rAte of the first propAgtion step must Be veRy slow becAuse it is Very endotheic; the ActiVAtion energy must be t leAst + 1 38 kLmole TheroDynAcAlly the overAll reAction is eDotheric so An equil ibrium woulD fAvor eActAnts, not products there is no energy DecreAse to Drve the reAcion to proDucs. 48 PropANe hAs six primAry hyDrogens Nd two seconDAry hyDrogens, A rAtio of 3 F pmA AD secondRy hydrogens were replAced by chlone At equAl rtes, the chloropropAne isomers woulD reect the sme 3 1 rAtio, thAt is, 75% chloropropAne And 25% 2-chloropropAne. H H d) H H H h H H All Are 2 H 4-2 3 a H AbstrAction...
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