Qhov sib txawv tseem ceeb ntawm cis thiab trans isomers yog tias cis isomer muaj tib lub atoms ntawm tib sab ntawm ob daim ntawv cog lus whereas lub trans isomer muaj ob ntawm tib atoms nyob rau sab nraud ntawm ob daim ntawv cog lus.
Isomers yog cov sib xyaw sib xyaw nrog tib cov qauv molecular. Muaj ntau hom isomers. Tab sis, peb tuaj yeem faib cov isomers rau hauv ob pawg raws li kev cai lij choj isomers thiab stereoisomers. Ntawm no, txoj cai isomers yog isomers qhov twg kev sib txuas ntawm atoms txawv hauv cov molecules. Hauv stereoisomers, atoms txuas rau tib lub sijhawm, tsis zoo li kev cai lij choj isomers. Yog li ntawd, stereoisomers txawv tsuas yog nyob rau hauv kev npaj ntawm lawv cov atoms nyob rau hauv qhov chaw. Tsis tas li ntawd, stereoisomers muaj ob hom; enantiomers thiab diastereomers. Tsis tas li ntawd, cis thiab trans isomers yog ob hom diastereomers.
Cis Isomers yog dab tsi?
Lub molecule uas ob ntawm tib lub atoms nyob rau tib sab ntawm ob daim ntawv cog lus yog cis isomer. Lub cis isomer muaj qhov kub siab dua piv rau trans isomer. Yog vim li cas rau qhov no yog qhov muaj zog intermolecular rog hauv cis isomers.
Daim duab 01: Cis Isomer ntawm Butene
Piv txwv li, hauv 1, 2-dichloroethane, thaum lub molecule yog cis, ob lub electronegative chlorine atoms nyob rau ntawm ib sab ntawm lub molecule. Vim li no, sab ntawm lub molecule yuav muaj qhov tsis zoo me ntsis thaum lwm sab yuav muaj qhov zoo me ntsis. Yog li ntawd, lub molecule dhau los ua ib tug polar thiab dipole-dipole kev sib cuam tshuam yuav tshwm sim ntawm molecules. Cov hluav taws xob sib txuas ntxiv no hauv cis isomer muab qhov kub siab dua piv rau trans isomers.
Dab tsi yog Trans Isomers?
Ib lub molecule nrog ob ntawm tib lub atoms nyob rau sab nraud ntawm ob daim ntawv cog lus yog trans isomer. Trans isomers yuav muaj cov ntsiab lus qis dua vim tias txawm tias muaj kev sib cais, tag nrho cov molecule ua tsis yog-polar.
Daim duab 02: Trans Isomer ntawm Butene
Txawm li cas los xij, trans isomers muaj qhov melting ntau dua. Trans isomers muaj cov duab ncaj, thiab lawv ntim tau zoo. Yog li ntawd, nws yuav tsum muaj lub zog ntau dua los yaj cov molecule uas muab nws lub ntsiab lus melting ntau dua.
Qhov txawv ntawm Cis thiab Trans Isomers yog dab tsi?
Cov molecule uas ob ntawm tib lub atoms nyob rau tib sab ntawm ob daim ntawv cog lus yog hu ua cis isomer. Ntawm qhov tod tes, ib lub molecule nrog ob ntawm tib lub atoms nyob rau sab nraud ntawm ob daim ntawv cog lus yog hu ua Trans isomer. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm cis thiab trans isomers. Tsis tas li, los ntawm kev sib piv lawv cov khoom, peb tuaj yeem txheeb xyuas qee qhov sib txawv ntawm cis thiab trans isomers. Lub cis isomers yog polar thaum lub trans isomers yog piv tsis yog polar. Yog li ntawd, cis isomer muaj qhov kub siab dua piv rau hauv trans isomer. Txawm li cas los xij, trans isomers muaj cov ntsiab lus melting ntau dua; Nyob rau hauv sib piv, cis molecules muaj ib tug qis melting point. Qhov no yog vim li cas, cov trans molecules tau ntim zoo dua cis molecules.
Cov hauv qab no qhia txog qhov sib txawv ntawm cis thiab trans isomers hauv daim ntawv tabular.
Summary – Cis vs Trans Isomers
Hauv cov ntsiab lus, cis thiab trans isomers yog diastereomers uas tuaj nyob rau hauv cov stereoisomers. Thiab, qhov sib txawv tseem ceeb ntawm cis thiab trans isomers yog tias cis isomer muaj tib lub atoms ntawm tib sab ntawm ob daim ntawv cog lus whereas lub trans isomer muaj ob ntawm tib lub atoms nyob rau sab nraud ntawm ob daim ntawv cog lus.
