Video: Puas yog br2 syn lossis anti?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Bromine reacts nrog cov ntawv cog lus no, tab sis tsis yog cov nplhaib uas muaj ntxhiab, ua rau nws muaj peev xwm paub qhov txawv ntawm cov molecules unsaturated uas muaj cov nplhaib uas muaj ntxhiab thiab cov uas muaj carbon-carbon π bonds. Theoretically, Br2 tuaj yeem ntxiv ib qho tiv thaiv (sab sab nraud) los yog syn (tib sab) hauv qhov tshuaj tiv thaiv no.
Hauv qhov no, puas yog br2 ntxiv syn lossis anti?
Nqe lus piav qhia: Kev kho ntawm alkenes nrog bromine ( Br2 ) muab vicinal dibromides (1, 2-dibromides). Lus Cim: Cov bromines ntxiv rau opposite ntsej muag ntawm ob daim ntawv cog lus ( tiv thaiv ntxiv”). Qee lub sij hawm cov kuab tshuaj tau hais hauv cov tshuaj tiv thaiv no - ib qho hnyav hnyav yog carbon tetrachloride (CCl4).
Tsis tas li ntawd, puas yuav br2 yaj hauv CCl4? Br2 yog ntau ntxiv soluble Hauv tetrachloromethane, CCl4, dua li yog hauv dej.
Qhov thib ob, puas yog bromination syn lossis anti?
Hauv tiv thaiv Tsis tas li ntawd, ob qho kev hloov pauv tau ntxiv rau sab nraud (lossis ntsej muag) ntawm ob daim ntawv cog lus lossis triple daim ntawv cog lus, ib zaug ntxiv ua rau txo qis ntawm daim ntawv cog lus thiab nce ntau ntawm cov neeg hloov pauv. Classical piv txwv ntawm no yog bromination (ib yam halogenation ) ntawm alkenes.
Qhov kuaj bromine qhia li cas?
Bromine xeem . Hauv cov organic chemistry, lub bromine xeem yog qualitative xeem rau lub xub ntiag ntawm unsaturation (carbon-to-carbon ob los yog triple bonds), phenols thiab anilines. Qhov ntau unsaturated ib tug tsis paub yog, the ntau bromine nws reacts nrog, thiab cov xim tsawg dua cov tshuaj yuav tshwm sim.
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