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annale actualisée 2011 maraichers


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Posted

Salut, 

Ce qu'il se passe c'est que le doublet non liant du carbone 3 (celui qui porte la charge neg) est délocalisé à droite, forme la double liaison en position 2,3 et le doublet pi de la double liaison entre les carbones 1 et 2 est lui aussi déloc à droite (vers le N) et forme la triple liaison. Je sais pas si c'est visualisable cque je dis ahah 

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