Peb tuaj yeem hu nws 2-butene, tab sis qhov tseeb muaj ob qhov sib txuas; lub ob npaug ntawm daim ntawv cog lus hauv cis-trans isomerism (Daim duab 13.2. 2).
Puas yog 2 pentene muaj cis-trans isomers?
2-Pentene muaj ob lub geometric isomers, cis-2-pentene thiab trans-2-pentene.
Qhov twg tuaj yeem qhia cis-trans isomerism?
Rau qhov alkene nrog ib qho carbon-carbon ob daim ntawv cog lusuas tuaj yeem qhia cis-trans isomerism, ob lub cis-trans isomers ua tau. Txog tam sim no ib qho alkene nrog n tus naj npawb ntawm carbon-carbon ob daim ntawv cog lus, txhua tus tuaj yeem pom cis-trans isomerism, 2n cis-trans isomers ua tau.
Puas 2 Methylpropene qhia cis-trans isomerism?
Ntau lub tebchaw uas muaj ob daim ntawv cog lus tuaj yeem pom cov duab geometrical isomerism. Piv txwv li, muaj plaub butylene: isobutylene (2-methylpropene), 1-butene, thiab cis-1 thiab trans-2-butenes (Fig. 2-5). Ob lub ntsiab lus tom kawg yog stereoisomers ntawm ib leeg, thiab ob qho tib si yog cov qauv isomers ntawm isobutylene thiab 1-butene.
Puas yog 3 methyl 2 pentene muaj cis-trans isomers?
Tam sim no muaj ob qhov ua tau isomers, vim tias qhov=hloov tsis tau: … E-isomer qhov twg lawv nyob rau sab nraud (los ntawm Entgegen=opposite). Nco tseg: Lawv tseem hu ua cis- (Z) thiab trans- (E).
