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  • Katholieke Universiteit Leuven (KU Leuven)
  • Bio Ingenieurswetenschappen
  • Organische chemie
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Organische chemie: visuele samenvatting - substitutie en eliminatiereacties

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Organische chemie
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Organische chemie: visuele samenvatting - substitutie en eliminatiereacties alle soorten reacties weergegeven, belangrijke stappen en waar op te letten!

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Hoofdstuk 2: Substitutiereacties op C sp3 en
Eliminatiereacties
Organische verbindingen met elektronegatief atoom(groep) op sp3 gehybridiseerd C-
atoom kunnen substitutie ondergaan (ROH/ROR’/ROX)

2.1 Bimoleculaire nucleofiele substitutie SN2

Reactiesnelheid Reactie gebeurt in één stap. Beide moleculen bepalen
de snelheid
v=k.
[ molecul
Transitietoestand In TT is C-atoom sp2 (vlak)
Ruimtelijke schikking Walden Inversie
opmerkingen Bij alcoholen en ethers  activatie door
1. protonering
2. omzetting tot sulfonaatesters



Reactiviteit
LG Basiciteit , reactiviteit
hoe zwakkere base, hoe minder sterk gebonden aan
C-atoom
ROH /ROR’ /RX Prim > sec > tert
 sterische hinder
Nucleofiel (nucleofiliciteit) Basiciteit , reactiviteit

Solvent Aprotisch/ niet-protisch
 als solvent protisch is gaat het binden met het
nucleofiel en krijgen we geen reactie
LG
Nu




LG Nu




2.2 Unimoleculaire nucleofiele substitutie SN1

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Subjects

  • organische chemie
  • substitutie
  • eliminatie

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