Racemic sib tov yog feem ntau tsim thaum cov tshuaj achiral hloov mus ua chiral ones Qhov no yog vim qhov tseeb tias chirality tsuas yog paub qhov txawv hauv ib puag ncig chiral. Cov tshuaj achiral nyob rau hauv ib puag ncig achiral tsis nyiam los tsim ib qho enantiomer dua lwm tus.
Nyob rau hauv cov tshuaj tiv thaiv haiv neeg twg yog tsim los ntawm halogenation?
Yog free radical halogenation tsim kom muaj chiral carbon, racemic sib xyaw ntawm halides ib txwm tsim vim muaj qhov sib npaug ntawm halogenation los ntawm ob sab ntawm planar dawb radical.
Puas yog haiv neeg SN1 lossis SN2?
Vim tias cov carbocation xav tias lub hom phiaj, kev tawm tsam los ntawm nucleophile tuaj yeem tshwm sim los ntawm ob sab ntawm lub dav hlau. Qhov no ua rau muaj kev sib xyaw ntawm enantiomers, hu ua racemic sib tov. Qhov no yog qhov sib piv rau SN2uas tsuas yog tsim cov stereoisomer inverted ntawm cov reactant.
Yuav ua li cas yog kev ntxub ntxaug muab piv txwv?
Qee cov tshuaj molecules yog chiral, thiab cov enantiomers muaj qhov sib txawv ntawm cov khoom lom. Lawv tuaj yeem raug muag raws li ib qho enantiomer lossis raws li kev sib xyaw racemic. Piv txwv suav nrog thalidomide, ibuprofen, cetirizine thiab salbutamolAdderall yog qhov sib npaug ntawm ob qho tib si amphetamine enantiomers.
Dab tsi yog kev sib tw sib tw ntawm cov khoom?
Racemic sib tov, tseem hu ua racemate, kev sib xyaw ntawm qhov sib npaug ntawm ob enantiomers, lossis cov khoom uas muaj cov qauv molecular dissymmetric uas yog daim iav duab ntawm ib leeg.
