2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Nws vim electrons ntawm ntau daim ntawv cog lus carbon-carbon tau nthuav tawm ntau dua thiab tsis ruaj khov. … Cov txheeb ze sib raug zoo ntawm ntau cov pa roj carbon-carbon daim ntawv cog lus xws li peb alkyne thiab alkanes yog me dua li ib daim ntawv cog lus ntawm ib qho alkene yog li ua rau nws tsis ruaj khov thiab rov ua haujlwm.
Puas alkynes ruaj khov dua alkenes?
Vim alkynes yog cov thermodynamically tsis ruaj khov dua alkenes, peb yuav xav tias qhov kev cuam tshuam ntxiv ntawm qhov qub yuav ua rau exothermic ntau dua thiab nrawm dua li qhov sib npaug ntawm qhov kawg. … Kev tshawb fawb ywj pheej ntawm hydrogenation tus nqi rau txhua chav kawm qhia tias alkenes hnov mob sai dua alkynes.
Vim li cas alkynes ruaj khov dua piv rau alkenes?
Re: txheeb ze Stabilities ntawm Alkenes/Alkynes
Internal alkenes/alkynes ruaj khov dua li cov davhlau ya nyob twg vim thaum daim ntawv cog lus yog sab hauv thiab txuas nrog ntau dua ib qho carbon-secondary, tertiary, quaternary--, pi bonds tau ruaj khov dua los ntawm cov carbons nyob ib puag ncig.
Vim li cas alkynes ruaj khov?
Benzylic thiab allylic radicals ruaj khov dua li alkyl radicals vim yog cov teebmeem resonance - ib qho hluav taws xob tsis sib xws tuaj yeem raug delocalized hla lub kaw lus ntawm kev sib txuas pi. Ib qho allylic radical, piv txwv li, tuaj yeem ua duab raws li qhov system ntawm peb qhov sib luag 2pz orbitals sib koom peb electrons.
Vim li cas alkanes ruaj khov dua alkenes?
Nco ntsoovhais lus, alkenes tsis ruaj khov dua alkanes. Hauv alkanes, tsuas muaj σ bonds (piv txwv li C-C ib daim ntawv cog lus thiab C-H daim ntawv cog lus). Lub zog ntawm qhov nruab nrab C-C ib daim ntawv cog lus yog nyob ib ncig ntawm 347 kJ / mol, thiab C-H daim ntawv cog lus nyob ib ncig ntawm 308 ~ 435 kJ / mol, ob qho tib si xav tau lub zog siab heev kom tawg.
Pom zoo:
Vim li cas emulsion tsis ruaj khov?
Emulsions yog cov tshuab thermodynamically tsis ruaj khov thiab nrawm nrawm rau hauv nyias txheej ntawm cov roj thiab dej [21]. Qhov no yog vim sib txawv ntawm cov roj thiab aqueous theem thiab kev sib cuag tsis zoo ntawm cov roj thiab dej molecules [
Puas khov kho thiab ruaj khov zoo ib yam?
Stable thiab khov kho ob leeg muaj ze rau tib yamlub ntsiab lus, txawm li cas los xij muaj qhov sib txawv me me. Stable txhais tau hais tias xijpeem koj tab tom tham txog nws nyob ntsiag to / zoo ib yam / tsis hloov lub sijhawm. Steady txhais tau hais tias nws nyob twj ywm / sib npaug / tsis hloov mus rau lub sijhawm txuas ntxiv.
Vim li cas huab cua nyob ruaj khov?
Cov huab cua tau hais kom ruaj khov yog tias ib puag ncig lapse tus nqi tsawg dua qhov moist adiabatic lapse rate. Qhov no txhais tau hais tias qhov nce ntawm huab cua parcel yuav ib txwm txias ntawm tus nqi nrawm dua li ib puag ncig, txawm tias tom qab nws ncav cuag saturation.
Puas muaj qhov chaw ruaj khov puas txhais tau tias tsis muaj zog nyob ruaj khov?
Thawj zaug nco ntsoov tias lub sijhawm kawg thib ob tsis suav tias yog lub ntsiab lus ntawm qhov muaj zog nyob ruaj khov, yog li, muaj zog ruaj khov tsis tas txhais tau tias tsis muaj zog nyob ruaj khov. Puas muaj zog nyob ruaj khov txhais tau tias tsis muaj zog nyob ruaj khov?
Vim li cas oxime ruaj khov dua nitroso?
Nyob rau hauv oxime, nitrogen txuas rau carbon los ntawm ob daim ntawv cog lus (II), thaum nyob rau hauv nitroso daim ntawv, nitrogen yog txuas rau oxygen los ntawm ob daim ntawv cog lus (I). Ntau dua qhov sib txawv ntawm electronegativity ntawm atoms, muaj zog dua yog daim ntawv cog lus.
