2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
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).
Pom zoo:
Puas yog cov tshuaj meso qhia pom qhov isomerism?
Teb tiav: Ib qho meso compound lossis meso isomer yog tus tswv cuab uas tsis muaj qhov muag pom ntawm ib pab pawg neeg stereoisomers, uas muaj tsawg kawg yog ob lub qhov muag pom. Qhov no txhais tau hais tias cov molecule tsis yog chiral txawm hais tias nws muaj ob los yog ntau tshaj stereo genic centres.
Koj puas tuaj yeem loj hlob tuaj yeem los ntawm kev txiav?
Siv cov ntoo txiav ntoo hauv nruab nrab mus rau lub caij ntuj sov lig thiab hauv paus raws li hauv qab no: txiav stems 10 mus rau 12 ntiv ntev, xaiv cov uas hloov tau yooj yim rau khoov, tab sis tawg nrog snap. Txiav sab saum toj 4 mus rau 6 ntiv tes los ntawm cov qia thiab tshem tawm cov nplooj hauv qab.
Kuv puas tuaj yeem tso kuv tus dev tsis tuaj yeem?
Nco ntsoov tshem koj tus dev lub dab tshos, tshwj xeeb tshaj yog tias koj muaj cov cim rau ntawm nws, kom paub tseeb tias tsis muaj dab tsi tuaj yeem ntes tau ntawm lub crate. … Txawm li cas los xij, tsuas yog peb tus dev xwb, uas peb tso siab tau tag nrho.
Tornadoes puas tuaj yeem pom tsis pom?
Ib cua daj cua dub pib raws li kev tig, funnel-puab huab nthuav dav los ntawm huab cua huab cua puag, uas cov kws ntsuas huab cua hu ua huab cua funnel. Lub funnel huab tau pom los ntawm huab cua, txawm li cas los xij, qee zaum nws tuaj yeem pom pom tsis pom vim tsis muaj dej noo.
Koj puas tuaj yeem pom fovea centralis nrog lub qhov muag pom?
Saib ntawm Retina Los ntawm Ophthalmoscope Nyob rau sab xis yog daim duab ntawm tus neeg saib xyuas qhov muag pom thaum saib koj lub retina nrog ophthalmoscope. Qhov tsaus ntuj ze ntawm qhov chaw yog lub fovea. … Thaum peb kho (saib ncaj qha ntawm) cov khoom, cov duab ntawm cov khoom no yog npaj rau ntawm fovea.
