Video: Dab tsi yog txhais los ntawm e Z isomerism?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Piav: Hauv stereoisomers , cov atoms tau koom nrog tib qho kev txiav txim, tab sis lawv muaj qhov sib txawv ntawm qhov sib txawv. Hauv E − Z yog isomers koj yuav tsum muaj: txwv kev sib hloov, feem ntau suav nrog C = C ob daim ntawv cog lus. ob pawg sib txawv ntawm ib kawg ntawm daim ntawv cog lus thiab ob pawg sib txawv ntawm lwm qhov kawg.
Tsis tas li ntawd, qhov txawv ntawm E thiab Z isomers yog dab tsi?
Hauv tsab ntawv E , kab rov tav strokes tag nrho ntawm tib sab; hauv E isomer , cov pab pawg tseem ceeb dua nyob rau sab nraud. Hauv tsab ntawv Z , kab rov tav strokes ntawm opposite sab; hauv isomer Z , cov pab pawg nyob rau tib sab.
Tom qab, lo lus nug yog, dab tsi ua rau E Z isomerism? E − Z yog isomerism tshwm sim vim muaj kev txwv kev sib hloov ntawm ob daim ntawv cog lus.
Raws li, E thiab Z sawv cev rau dab tsi hauv chemistry?
Rau alkene lossis cycloalkane nrog E-Z isomers, E txhais tau hais tias ob pawg nrog qhov tseem ceeb dua ntawm ob C atoms rau ob daim ntawv cog lus yog nyob rau sab nraud; sib piv, Z txhais tau hais tias ob pawg nrog qhov tseem ceeb dua ntawm ob daim ntawv cog lus C atoms nyob rau tib sab.
Puas yog E lossis Z ruaj khov dua?
Cov E / Z sau ntawv yog unamibiguous. Z (los ntawm German zusammen) txhais tau tias ua ke thiab feem ntau sib raug rau lub sij hawm cis; E (los ntawm German entgegen) txhais tau hais tias rov qab thiab feem ntau sib raug rau lub sij hawm trans. Feem ntau, E isomers yog ruaj khov dua tshaj Z isomers vim muaj cov teebmeem steric.
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