Video: Lub geometrical duab ntawm Allene yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Lub hauv paus carbon yog sp-hybridized, thiab ob lub davhlau ya nyob twg carbon atoms yog sp2- hybridized. Lub kaum sab xis tsim los ntawm peb cov pa roj carbon atom yog 180 °, qhia txog kab geometry rau nruab nrab carbon atom. Ob lub davhlau ya nyob twg carbon atoms yog planar, thiab cov dav hlau no yog twisted 90 ° ntawm ib leeg.
Yog li ntawd, tus qauv ntawm Allene yog dab tsi?
Ib allene yog ib qho kev sib xyaw ua ke uas ib qho carbon atom muaj ob daim ntawv cog lus nrog txhua qhov ntawm nws ob qhov chaw nyob sib ze. Allenes yog cais raws li polyenes nrog cumulated dienes. Cov niam txiv compound ntawm chav kawm no yog propadiene, uas yog nws tus kheej kuj hu ua allene.
Ib sab saum toj no, Allenes puas qhia geometrical isomerism? Allenes tsis tuaj yeem tsim cis-trans isomers , tab sis lawv tuaj yeem tsim cov enantiomers. Ib qho cumulene nrog tus lej khib ntawm ob daim ntawv cog lus yog geometrically qauv zoo li ethylene (lub 4 atoms txuas nrog ob daim ntawv cog lus nyob rau hauv tib lub dav hlau raws li ob daim ntawv cog lus) thiab muaj peev xwm muaj ib khub ntawm cis-trans isomers.
Tom qab ntawd, Allene puas yog lub phiaj xwm?
Allene tsis yog kev npaj vim txoj kev cov pa roj carbon atoms sib txuas rau hauv nruab nrab atom. Tshwj xeeb tshaj yog, Allene muaj ob lub carbons sib koom ua ke rau ob sab ntawm lub hauv paus carbon los ntawm ob daim ntawv cog lus, uas tuaj yeem txhais tau tias yog pi-bond.
Vim li cas Allenes tsis ruaj khov?
Ib Allene muaj ob daim ntawv cog lus. Interestingly ob π bonds yog perpendicular rau ib leeg, vim hais tias tsis muaj overlapping ntawm lub vacant p orbitals, thaum kawg ua rau tsis muaj delocalization ntawm electrons. Qhov no suav rau instability ntawm allenes.
Pom zoo:
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