Cov txheej txheem:

Puas yog stereoisomers txawv molecules?
Puas yog stereoisomers txawv molecules?

Video: Puas yog stereoisomers txawv molecules?

Video: Puas yog stereoisomers txawv molecules?
Video: puas yog koj ntshai yuav kuv ntsaim vaj 2022 -2023 2024, Kaum ib hlis
Anonim

Cov qauv isomers muaj tib yam molecular formula mas a txawv kev sib koom ua ke ntawm cov atoms. Stereoisomers muaj zoo tib yam molecular cov qauv thiab kev npaj ntawm atoms. Lawv txawv ntawm ib leeg tsuas yog nyob rau hauv lub spatial orientation ntawm pawg nyob rau hauv lub molecule.

Cov lus nug tseem yog, puas yog stereoisomers tib lub molecule?

R, S thiab S, R stereoisomers yog superimposableon lawv daim iav dluab thiab zoo tib yam. Lawv yog cov tibmolecule thiab nws tsis yog qhov tseeb los piav txog lawv li kev cais lossis cais stereoisomers . Lawv yog meso compound; a molecule nrog asymmetric carbon atoms uas nws daim iav duab yog superimposable.

Tsis tas li ntawd, muaj pes tsawg tus stereoisomers no molecule muaj? Yog li hauv cov qauv saum toj no, peb muaj tsuas yog onechiral carbon. Yog li ntawd yog 2 stereogenic chaw. Tom qab ntawd nrhiav tus lej stereoisomers siv tus qauv 2^n; 2^2 = 4 stereoisomers.

Hauv qhov no, dab tsi yog qhov txawv ntawm stereoisomers?

Ob yam tseem ceeb ntawm stereoisomerism yog:

  • DiaStereomerism (xws li 'cis-trans isomerism')
  • Optical Isomerism (tseem hu ua 'enantiomerism' thiab 'chirality')

Puas yog stereoisomers muaj lub cev sib txawv?

Lub cev muaj zog ntawm Stereoisomers . Enantiomers muaj vaj huam sib luag nyob rau hauv tag nrho lawv lub cev khoom Tsuas yog rau lawv qhov kev sib hloov kho qhov muag, raws li lawv tig lub dav hlau ntawm lub teeb polarized los ntawm qhov sib npaug ntawm qhov sib txawv. Lawv txawv tsuas yog nyob rau hauv lawv cov kev taw qhia ntawm opticalrotation.

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