Koj npe R thiab S stereoisomers li cas?
Koj npe R thiab S stereoisomers li cas?

Video: Koj npe R thiab S stereoisomers li cas?

Video: Koj npe R thiab S stereoisomers li cas?
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Stereocenters tau sau npe R los yog S

Cov "sab tes" thiab "sab laug tes" nomenclature yog siv rau npe tus cov enantiomers ntawm ib qho chiral compound. Cov stereocenters tau sau npe ua R los yog S . Xav txog thawj daim duab: tus xub nkhaus yog kos los ntawm qhov tseem ceeb tshaj plaws (1) hloov mus rau qhov tseem ceeb tshaj plaws (4) hloov pauv.

Tom qab ntawd, ib tus tuaj yeem nug, koj yuav txiav txim siab qhov tseem ceeb rau R thiab S li cas?

Yog tias peb pawg projecting rau koj raug txiav txim siab tshaj plaws qhov tseem ceeb (#1) rau qis tshaj qhov tseem ceeb (#3) clockwise, ces lub configuration yog " R ”. Yog tias peb pawg projecting rau koj raug txiav txim siab tshaj plaws qhov tseem ceeb (#1) rau qis tshaj qhov tseem ceeb (#3) counterclockwise, ces lub configuration yog " S ”.

Ib yam li ntawd, S thiab R configuration yog dab tsi? Cov R / S system yog ib qho tseem ceeb nomenclature system rau denoting enantiomers. Txoj hauv kev no sau txhua qhov chaw chiral R los yog S raws li ib qho system uas nws cov neeg hloov pauv yog txhua tus muab qhov tseem ceeb, raws li Cahn-Ingold-Prelog cov cai tseem ceeb (CIP), raws li tus lej atomic.

Ntawm no, R thiab S txhais li cas hauv cov chemistry?

Ua raws li cov kev taw qhia ntawm qhov tseem ceeb ntawm 3 qhov tseem ceeb los ntawm qhov siab tshaj plaws mus rau qhov tseem ceeb tshaj plaws (qis mus rau ntau tshaj, 1<2<3). Ib tug counterclockwise kev taw qhia yog ib S (sinister, Latin rau sab laug) configuration. Lub clockwise kev taw qhia yog ib R (rectus, Latin rau txoj cai) configuration.

Puas yog R thiab S enantiomers?

Stereocenters tau sau npe R los yog S Lub npe "sab tes" thiab "sab laug" nomenclature yog siv rau lub npe cov enantiomers ntawm ib qho chiral compound. Cov stereocenters tau sau npe ua R los yog S . Xav txog thawj daim duab: tus xub nkhaus yog kos los ntawm qhov tseem ceeb tshaj plaws (1) hloov mus rau qhov tseem ceeb tshaj plaws (4) hloov pauv.

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