Nyob rau hauv lub nplhaib aromatic yooj yim ntawm benzene lub delocalization ntawm rau π electrons π electrons Nyob rau hauv chemistry, pi bonds (π bonds) yog covalent tshuaj bonds qhov twg ob lobes ntawm ib lub orbital ntawm ib lub atom sib tshooj ob lobes. ntawm lub orbital ntawm lwm atom thiab qhov sib tshooj no tshwm sim tom qab. … Pi daim ntawv cog lus tuaj yeem tsim ua ob thiab peb daim ntawv cog lus tab sis tsis tsim hauv ib daim ntawv cog lus feem ntau. https://en.wikipedia.org › wiki › Pi_bond
Pi daim ntawv cog lus - Wikipedia
hla C6 ntiv nplhaib feem ntau qhia los ntawm lub voj voog.
Delocalised electrons nyob rau hauv benzene nyob qhov twg?
Benzene kuj yog lub voj voog molecule uas txhua lub nplhaib atoms yog sp 2-hybridized uas tso cai rau π electrons kom delocalized hauv molecular orbitals uas Txuas mus rau txhua txoj kev ncig lub nplhaib, saum toj thiab hauv qab lub dav hlau ntawm lub nplhaib.
Yuav ua li cas koj pom tus naj npawb ntawm delocalized electrons?
Txoj hauv kev yooj yim tshaj plaws kom pom cov hluav taws xob delocalized yog piv cov chaw hluav taws xob hauv ob daim ntawv resonanceYog tias ib khub tshwm hauv ib qho chaw hauv ib daim ntawv, thiab nyob rau hauv ib qho chaw sib txawv hauv lwm daim ntawv, khub yog delocalized. Koj tuaj yeem pom tus cwj pwm delocalized hauv resonance daim ntawv I thiab II hauv qab no.
pes tsawg sp2 nyob rau hauv benzene nplhaib?
Nyob hauv no, 1 s orbital thiab ob p orbitals yog hybridized thiab tsim peb sp2 hybridized orbitals. Txhua cov pa roj carbon atoms yuav tsim sigma daim ntawv cog lus nrog ob lwm cov pa roj carbon monoxide thiab ib lub atom hydrogen. Benzene yog kev sib xyaw ntawm carbon thiab hydrogen atoms.
Yuav muaj pes tsawg sigma thiab pi bonds nyob rau hauv benzene nplhaib?
Tam sim no, saib cov qauv ntawm benzene, peb pom tau tias muaj 3 C=C bonds. Yog li ntawd, muaj 12 sigma daim ntawv cog lus thiab 3 pi daim ntawv cog lusBenzene yog li ntawd tsim los ntawm 15 cov nyiaj cog lus. Yog li, cov lus teb yog - kev xaiv (b) - Tus naj npawb ntawm sigma thiab pi daim ntawv cog lus hauv benzene yog 12 thiab 3, raws li.
