Qhov twg diene ruaj khov tshaj?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Qhov kev sib txuas ntxiv ntawm kev sib txuas ntawm π uas nyob ib sab ua rau lub conjugated cov dyes tus ruaj khov hom ntawm diene . Conjugated cov dyes 15 kJ / mol lossis 3.6 kcal / mol ruaj khov dua tshaj cov alkenes yooj yim.

Yog li ntawd, dab tsi ua rau lub diene ruaj khov?

Nonconjugated (Ib leeg) Dienes yog ob ob daim ntawv cog lus sib cais los ntawm ntau tshaj ib daim ntawv cog lus. Nquag Dienes yog ob daim ntawv cog lus txuas nrog lub atom zoo sib xws. Txij li thaum muaj ntau electron ceev delocalized ua lub molecule ruaj khov dua sib txuas cov dyes yog ruaj khov dua tshaj tsis conjugated thiab cumulated cov dyes.

Ib yam li ntawd, vim li cas tus neeg tuag yuav tsum yog CIS? Conformational xav tau ntawm cov diene Ib qho quirk ntawm Diels-Alder cov tshuaj tiv thaiv yog qhov diene yog xav tau ua nyob rau hauv s - cis Kev ua raws li kev txiav txim rau Diels-Alder cov tshuaj tiv thaiv ua haujlwm. Cov s - cis kev sib haum xeeb muaj ob qho tib si ntawm ob daim ntawv cog lus taw qhia rau tib sab ntawm cov pa roj carbon-carbon ib daim ntawv cog lus uas txuas rau lawv.

Ua raws li qhov kev pom no, kev sib txuas ua rau muaj kev ruaj ntseg li cas?

Hauv chemistry, a sib txuas qhov system yog ib qho kev sib txuas ntawm p orbitals nrog delocalized electrons nyob rau hauv ib lub molecule, uas feem ntau txo qis tag nrho lub zog ntawm cov molecule thiab nce. ruaj khov . Nws yog conventionally sawv cev raws li muaj alternating ib leeg thiab ntau daim ntawv cog lus.

Diene nqi yog dab tsi?

Kev txhais ntawm diene nqi .: ib tug lej ntsuas ntawm conjugated ob daim ntawv cog lus nyob rau hauv ib tug fatty acid los yog rog (xws li ib tug qhuav roj) uas yog xam los ntawm tus nqi ntawm maleic anhydride muaj peev xwm ntawm reacting nrog ib tug paub qhov ceeb thawj ntawm cov kua qaub los yog rog.