Sarrabm Posted January 6, 2017 Share Posted January 6, 2017 Bonsoir !! on fait réagir du pent2ène (config Z ) avec Br2 (halogénation ) donc les produits obtenus sont les énantiomères 2R,3R et 2S 3S. Mais l'item qui affirme que les énantiomères sont érythro est compté juste et je ne comprends pas pourquoi ! Moi je dirais Thréo . Merci !! Link to comment Share on other sites More sharing options...
caroline01 Posted January 6, 2017 Share Posted January 6, 2017 C'est le qcm 9 ? Parce que sur mon poly il est compté faux x) Link to comment Share on other sites More sharing options...
Sarrabm Posted January 6, 2017 Author Share Posted January 6, 2017 haha oui pardon j'ai mal lu les réponses ... la fatigue ... Dsl bonne soirée ! Link to comment Share on other sites More sharing options...
caroline01 Posted January 6, 2017 Share Posted January 6, 2017 Ça arrive tqt haha ! Aller courage ! Link to comment Share on other sites More sharing options...
Sarrabm Posted January 6, 2017 Author Share Posted January 6, 2017 Yep merci beaucoup !! Link to comment Share on other sites More sharing options...
Sarrabm Posted January 6, 2017 Author Share Posted January 6, 2017 J'ai une autre question : quand tu as para chloro benzène sulfonique , le para s'adresse au chlore ou au sulfate ? Link to comment Share on other sites More sharing options...
caroline01 Posted January 6, 2017 Share Posted January 6, 2017 Comme c'est dit là le chlore est en para Link to comment Share on other sites More sharing options...
Sarrabm Posted January 6, 2017 Author Share Posted January 6, 2017 ok et du coup le sulfate on le met ou ? Link to comment Share on other sites More sharing options...
caroline01 Posted January 6, 2017 Share Posted January 6, 2017 Tu peux me donner le QCM parce là comme ça c'est un peu compliqué haha ! Link to comment Share on other sites More sharing options...
caroline01 Posted January 6, 2017 Share Posted January 6, 2017 C'est bon je l'ai ! Alors il sera positionné en fonction des groupes activant ou désactivants Link to comment Share on other sites More sharing options...
Sarrabm Posted January 6, 2017 Author Share Posted January 6, 2017 oui voila Link to comment Share on other sites More sharing options...
caroline01 Posted January 6, 2017 Share Posted January 6, 2017 T'as compris ? Ou j'essaye d'expliquer haha ? Link to comment Share on other sites More sharing options...
Sarrabm Posted January 6, 2017 Author Share Posted January 6, 2017 oui c'est bon Tu as indirectement répondu à ma question Merci bcp !! Link to comment Share on other sites More sharing options...
caroline01 Posted January 6, 2017 Share Posted January 6, 2017 Avec plaisir Link to comment Share on other sites More sharing options...
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