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 kL£mole + -83 kL£mole = + 55 k/role (+ 33 kcAl¤mole + ¡20 kcA¥¤mole ¡ + 1 3 KcaVrole) (c¦ Io§iN¨tion of methAne is unfAVorAble for both K©Netic And thermoDynAmic reAsons. ªineticAlly, the rAte of the first propAg¨tion step must Be veRy slow becAuse it is Very endothe«ic; the ActiVAtion energy must be ¨t leAst + 1 38 kL¤mole¬ Ther­oDynA®¯cAlly° the overAll reAction is e±Dother²ic³ so An equil ibrium woulD fAvor ´eActAnts, not products µ there is no energy DecreAse to Dr¶ve the reAc·ion to proDuc·s. 4¸¹8 PropANe hAs six primAry hyDrogens ¨Nd two seconDAry hyDrogens, A rAtio of 3 º ¢ » ¼F p½mA¾ A±D second¨Ry hydrogens were replAced by chlo¿ne At equAl r¨tes, the chloropropAne isomers woulD reÀÁect the s¨me 3 1 rAtio, thAt is, 75% ÃÄchloropropAne And 25% 2-chloropropAne. H H Åd) H H H h H H All Are 2Æ H 4-2Ç 3 a H AbstrAction...
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This note was uploaded on 02/27/2010 for the course CHEM 140 taught by Professor Wade during the Spring '10 term at Whitman.

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