Cov cai hloov pauv rau cov tshuaj lom neeg

Txhawm rau kom muaj qhov tsim nyog thiab yooj yim qhia ntawm stereochemical kev sib raug zoo ntawm asymmetric tebchaw nyob rau hauv cov organic chemistry, RS Ingold, RC Kane, V. Prelug thiab lwm tus tau thov kom npaj cov pab pawg hloov pauv los ntawm tus lej atomic, nrog tus lej atomic siab tshaj plaws nyob rau pem hauv ntej thiab tus lej atomic qis tshaj tom qab. Cov txheej txheem yog hu ua txoj cai tseem ceeb ntawm atoms lossis pawg ntawm atoms, lossis kev txiav txim lossis kev txiav txim. Hauv kev txiav txim siab qhov tseem ceeb ntawm atoms lossis pawg, qee cov kev cai tau raug tsim, cov ntsiab lus tseem ceeb ntawm cov hauv qab no:
The various substituent atoms are arranged according to their atomic number size, the larger is the "better" group, and if it is an isotope, the higher quality is the "better" group. E.g. Cl>O>C>H; D>H, > hais tias superior.
If the first element of two groups is the same (e.g. C), compare the atoms directly connected to it. In order of atomic number, the largest of each group is compared first, and if it is still the same, then the second and third are compared successively. For example Cl, H, H>O, O, C; Cl, O, H>Cl, C, C, yog tias tseem zoo ib yam, raug muab piv nrog cov saw hloov pauv.
(3) Cov pab pawg uas muaj ob thiab triple daim ntawv cog lus raug kho raws li ob lossis peb daim ntawv cog lus ib leeg, thiab tuaj yeem suav tias muaj ob lossis peb qhov zoo tib yam atoms.
Los ntawm kev paub txog cov cai ntawm cov neeg hloov pauv, peb tuaj yeem tsis tsuas yog qhia ZE lub npe hauv geometric isomers, tab sis kuj txiav txim siab qhov teeb tsa RS ntawm optical isomers. Nyob rau hauv lub npe ntawm cov tebchaw, cov atoms los yog pab pawg ntawm atoms uas ua raws li ib tug substituents nyob rau hauv tib lub compound yuav tsum tau teem nyob rau hauv ib tug tsis tu ncua kev txiav txim, nrog rau cov pab pawg neeg zoo dua nyob rau hauv lub rov qab.