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Solutions_Manual_for_Organic_Chemistry_6th_Ed 478

Solutions_Manual_for_Organic_Chemistry_6th_Ed 478 - shIft...

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20-8 (a) The ethyl pat±er is obvIous: a 3H tRIplet at b 1.15 and a 2H quARtet at b 2.4± The only o±²e³ peak IS the COOH b ±1.9 (a 2²1 b UNit offset added ±o 9.8)³ (b) . IH 1 I I I 10 9 8 o Ii CH3CH2-C-Oh o . ±² Q £ h-C±Ch2Ch² I i ± 7 6 ´ b (ppm ´ £ ³h Q 2 H TMµ Ii iI ± I ² I ³ ´ 4 3 2 1 0 ¶he multipLe± be±weeN < 2 aNd < 3 Is d·awn as a pen±e± as t²o¸gh I± we·e sp¹It equally by the alde²yde Pºoto» aNd t²e CH2 g³oup. These coupliNg coNstants a³e p³obabLy unequa¼, IN whIch case the actuaL spLIttINg ½¾t¿eÀ wI¼¼ be a comÁ¼ex mu¼tip¼et (c) The chemical
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Unformatted text preview: shIft of the aldehyde p³o±oN Is between b 9µ¶0, no± as faR dowNfIeld as the cA³boXyLIc ÃcÄd p³oton. ÅLso, the aLde²yde p³otoN is sp¼It Into a ƳIpLeÆ bY ±²e ch2, unlIke ±²e COOH p³oton whÇc² aLways appea³s as a sInglet. FINa¼¼yÈ the CH2 Is spLIt by an ext³a p³o±on, so I± wIlL gIve a multIpLet wɱh complex splIttIng, iNstead of the qua³tet shown IN ±²e acId. 20·9 • • :Oh + 1 / C .´µ¶·¸¸ h2C=C Oh \ H t ¸¸ +OH ±± / C ¹º»¼½¸¸ H2C¾C OH \ h . ± ² ± . ¸ ¿Oh i + À C ¹º»¼½¸¸ h C-C Á OH 2 ³ h ¸ ¸ ¿Oh ± c h2CÂC à " Oh \ h 473...
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