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Samenvatting cel I:organische chemie Hoofdstuk 2
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Samenvatting cel I:organische chemie Hoofdstuk 2
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2. Stereo-isomerie en stereochemie: het belang van de derdedimensie in de chemie
1. Stereo-isomerie: Inleiding
Stereo-isomeren: wanneer twee moleculen (onmogelijk met elkaar tot overlap gebracht
kunnen worden zonder verwisseling van twee substituenten door breking van een binding
Stereo-isomeren: wanneer twee moleculen niet verschillen in constitutie/samenstelling
(zelfde structuurformule), maar ze hebben wel een andere ruimtelijke verdeling van de
atomen!
Koolstofatoom dat hiertoe aanleiding geeft is een stereogeen koolstofatoom/centrum,
aangegeven met *
2. Wanneer is een koolstof stereogeen?
Voorwaarden stereogeen centrum:
C: sp3-gehybridiseerd
Gebonden aan 4 verschillende substituenten (merk op: -COOH is een ander substituent
dan bv. -CH3)
1
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