Cycloalkanes zoo ib yam li alkanes hauv lawv lub cev lub cev, tab sis lawv muaj cov ntsiab lus kub siab dua, cov ntsiab lus melting, thiab ntom dua alkanes. Qhov no yog vim muaj zog London zog vim tias lub nplhaib zoo li tso cai rau thaj tsam loj ntawm kev sib cuag.
Dab tsi ua rau qhov kub nce ntxiv?
Cov molecules loj muaj ntau cov hluav taws xob thiab cov nuclei uas tsim cov van der Waals txaus nyiam zog, yog li lawv cov tebchaw feem ntau muaj cov ntsiab lus kub siab dua li cov khoom sib xws ua los ntawm cov khoom me me. … Lub zog txaus nyiam ntawm pab pawg tom kawg feem ntau ntau dua.
Cycloalkanes piv nrog qhov kub ntawm cov alkanes li cas nrog tib cov pa roj carbon atoms?
Cycloalkanes muaj cov ntsiab lus kub uas yog kwv yees 10 - 20 K siab dua cov saw ncaj ncaj alkane. Tsis muaj qhov sib txawv ntawm electronegativity ntau ntawm carbon thiab hydrogen, yog li tsis muaj kev sib txuas lus polarity. Cov molecules lawv tus kheej kuj muaj polarity tsawg heev.
Vim li cas cov tshuaj tsw qab muaj qhov kub siab dua?
Nyob rau hauv benzene, tib qho kev nyiam ntawm cov molecules nyob ze yog lub van der Waals dispersion rog. Tsis muaj dipole mus tas li ntawm cov molecule. … Qhov kub siab dua yog xav tias yog vim qhov yooj yim uas cov dipoles ib ntus tuaj yeem teeb tsa nrog cov hluav taws xob delocalized. Methylbenzene boils ntawm 111 ° C.
Vim li cas cyclohexane thiaj li melting point ntau dua methylcyclohexane?
Cyclohexane muaj qib siab ntawm symmetry, thiab qhov no ua rau cov molecules ntim tau zoo rau hauv cov qauv crystalline nrog muaj zog London dispersion rog ntawm lawv.. … Yog li, cyclohexene muaj ib tug qis melting point ntau dua cyclohexane (-103.5 ° C vs. 6.5 ° C).
Effect Of Branching On Boiling Point Of Alkanes
