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Izomeria compusilor organici

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ConfiguraŃia relativă după convenŃia<br />

Fischer – Rosanoff (D,L)<br />

ConfiguraŃiile stabilite în raport cu substanŃa etalon (aldehida glicerică) – notate prin convenŃia D, L<br />

H<br />

CHO<br />

OH<br />

CH 2OH<br />

H<br />

CHO<br />

CH2OH H OH<br />

D(+) glicerinaldehidã<br />

CHO<br />

OH<br />

CH 2OH<br />

oxidare<br />

D(+) glicerinaldehidã<br />

H<br />

COOH<br />

OH<br />

CH 2OH<br />

PBr 3<br />

D(-) acid gliceric<br />

CHO<br />

HOH2C HO H<br />

CHO<br />

COOH<br />

H OH H OH<br />

CH2OH D (+) aldehidã glicericã<br />

CH3 D(-) acid lactic<br />

CHO<br />

HO H<br />

L(-) glicerinaldehidã<br />

H<br />

COOH<br />

OH<br />

CH 2Br<br />

reducere<br />

acid D(-)3-brom-2hidroxipropionic<br />

H<br />

CH 2OH<br />

H<br />

COOH<br />

CH2OH D (-)acid gliceric<br />

COOH<br />

CH 3<br />

OH<br />

D(-) acid lactic<br />

OH

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