Epoxides muaj ntau dua reactive dua ethers yooj yim vim lub nplhaib strain. Nucleophiles tua cov electrophilic C ntawm C-O daim ntawv cog lus ua rau nws tawg, ua rau lub nplhaib qhib. Qhib lub nplhaib relieves lub nplhaib strain. Cov khoom lag luam feem ntau yog 2-hloov cawv.
Dab tsi tuaj yeem qhib tau epoxide?
Piv txwv li, aqueous acid [feem ntau "H3O+"yuav qhib ib qho epoxide nyob rau hauv ntau yam mob me dua li " zoo tib yam" ether xws li diethyl ether, vim epoxides muaj ntau lub nplhaib strain [li 13 kcal / mol].
Puas yog epoxide lub nplhaib qhib sn1 lossis sn2?
Thaum ib qho asymmetric epoxide dhau los ua solvolysis hauv methanol, lub nplhaib qhib tshwm sim los ntawm S N2 mechanism, thiab qhov tsawg dua carbon reacts nrog cov nucleophile nyob rau hauv kev txiav txim siab steric thiab tsim cov khoom B hauv qhov piv txwv hauv qab no.
Lub nplhaib epoxide yog dab tsi?
Epoxide, cyclic ether nrog peb lub nplhaib. Cov qauv hauv paus ntawm epoxide muaj cov pa oxygen atom txuas rau ob lub atoms uas nyob ib sab ntawm hydrocarbon. … Epoxides qhib tau yooj yim, nyob rau hauv acidic los yog yooj yim tej yam kev mob, muab ntau yam khoom uas muaj txiaj ntsig pab pawg neeg.
Nplhaib qhib kev tshwm sim yog dab tsi?
A polymerization nyob rau hauv uas ib tug cyclic monomer yieldsib chav tsev monomeric uas yog acyclic los yog muaj tsawg cycles tshaj lub monomer. Lus Cim: Yog tias monomer yog polycyclic, lubqhib ib lub nplhaib yog txaus los faib cov tshuaj tiv thaiv raws li lub nplhaib-qhib polymerization.
