Tus conformer twg ruaj khov dua?

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

Nyob rau hauv cov nqe lus ntawm ruaj khov , lub staggered conformation yog ruaj khov dua tshaj cov dab noj hnub. Qhov no yog vim ob yam: 1) Steric hindrance. Nyob rau hauv eclipsed kev sib haum xeeb , qhov chaw ntawm lub atoms yuam lawv los ze zog ua ke, ua kom cov steric strain nyob rau hauv lub molecule.

Ntawm no, lub rooj zaum twg conformer ruaj khov dua?

Cov rooj zaum conformation yog cov feem ntau ruaj khov conformation ntawm cyclohexane. Ib ob, ntau tsawg ruaj khov conformer yog lub nkoj kev sib haum xeeb . Qhov no ib yam nkaus thiab yuav luag tsis muaj lub kaum sab xis, tab sis qhov sib txawv muaj qhov sib txawv torsional cuam tshuam nrog eclipsed bonds ntawm plaub ntawm C atoms uas ua rau sab ntawm lub nkoj.

Tsis tas li ntawd, yog vim li cas staggered conformations ruaj khov? Staggered conformations yog ruaj khov dua tshaj dab noj hnub kev sib haum xeeb vim tias C-H daim ntawv cog lus sib nrug deb ntawm C-H daim ntawv cog lus sib cog lus H-C-H daim ntawv cog lus ntawm C (60 degrees). Cov feem ntau ruaj khov conformation ib txwm muaj qhov tsawg tshaj plaws electron-electron repulsion (yog staggered ) thiab muaj pawg bulkiest 180 degrees sib nrug.

Ua kom pom qhov no, qhov twg Newman qhov projection ruaj khov tshaj?

Cov ruaj khov ib tug yuav muaj lub rear hydrogen nyob nruab nrab ntawm lub pem hauv ntej methyl thiab bromine nyob rau hauv ib tug staggered conformation kom txo tau [ib leeg-pair]-[coj-electron] repulsions. 4) Tig cov pab pawg tom qab ntawm C2-C3 daim ntawv cog lus 120∘ counterclockwise los ntawm Newman projection qhia, thiab koj yuav muaj nws.

Qhov twg yog qhov ruaj khov dua los yog eclipsed?

Cov gauche form yog tsawg ruaj khov tshaj li daim ntawv tiv thaiv vim yog steric hindrance ntawm ob pawg methyl tab sis tseem yog ruaj khov dua tshaj qhov dab noj hnub tsim. Xws li kev sib cuam tshuam feem ntau hu ua a gauche -butane kev sib cuam tshuam vim butane yog thawj alkane nrhiav pom kom pom cov txiaj ntsig zoo li no.