Cov txheej txheem:
Video: Puas yog stereoisomers txawv molecules?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
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.
Pom zoo:
Polar molecules puas tiv thaiv cov tsis muaj polar molecules?
Polar molecules (nrog +/- tsub) yog nyiam rau cov dej molecules thiab yog hydrophilic. Nonpolar molecules yog repelled los ntawm dej thiab tsis yaj hauv dej; yog hydrophobic
Dab tsi yog qhov txawv ntawm qhov sib txawv ntawm qhov sib txawv thiab qhov sib txawv ntawm qhov ntab?
Integers thiab floats yog ob yam sib txawv ntawm cov ntaub ntawv tus lej. Ib tus lej (feem ntau hu ua anint) yog tus lej tsis muaj tus lej lej. Float isa floating-point number, uas txhais tau hais tias nws yog tus lej uas muaj tus lej lej. Floats siv thaum xav tau ntau dua
Puas yog dej molecules nyiam rau lwm cov polar molecules?
Raws li qhov tshwm sim ntawm dej polarity, txhua tus dej molecule attracts lwm cov dej molecules vim yog cov nqi sib txawv ntawm lawv, tsim hydrogen bonds. Dej kuj nyiam, lossis nyiam, lwm cov polar molecules thiab ions, suav nrog ntau cov biomolecules, xws li qab zib, nucleic acids, thiab qee cov amino acids
Koj paub qhov txawv ntawm stereoisomers li cas?
Hauv cis isomer cov methyl pawg nyob rau tib sab; whereas lawv nyob rau sab opposite nyob rau hauv lub trans isomer.Isomers uas txawv tsuas yog nyob rau hauv lub spatial orientation ntawm lawv cov ntsiab atoms yog hu ua stereoisomers
Dab tsi yog qhov txawv ntawm cov qauv isomers thiab stereoisomers?
Cov qauv isomers muaj tib lub qauv molecular tab sis muaj kev sib txuas sib txawv ntawm cov atoms. Stereoisomers muaj cov qauv molecular zoo tib yam thiab kev npaj ntawm atoms. Lawv txawv ntawm ib leeg xwb nyob rau hauv spatial orientation ntawm pawg nyob rau hauv lub molecule