Halogenation Ntawm Methane

Hauv tib hom tshuaj tiv thaiv, nws muaj peev xwm nkag siab qhov nyuaj ntawm cov tshuaj tiv thaiv los ntawm kev sib piv lub zog ua kom muaj zog ntawm ib kauj ruam los txiav txim siab cov tshuaj tiv thaiv.
Cov tshuaj tiv thaiv ntawm fluorine thiab methane yog ib qho loj ntawm exothermic, tab sis tseem yuav tsum tau ntxiv 4.2kJ / mol activation zog. Thaum cov tshuaj tiv thaiv tshwm sim, cov cua kub ntau yog qhov nyuaj rau tshem tawm, rhuav tshem cov fluoromethanes, thiab tau txais cov pa roj carbon thiab hydrogen fluoride, yog li cov tshuaj fluorination ncaj qha yog qhov nyuaj rau kev ua tiav. Cov tshuaj tiv thaiv ntawm iodine thiab methane yuav tsum muaj lub zog ua kom ntau dua 141 kJ / mol, thiab cov tshuaj tiv thaiv tsis yooj yim. Chlorination tsuas yog xav tau lub zog ua kom muaj zog ntxiv rau 16.7 kJ / mol, bromination tsuas yog xav tau lub zog ua kom ntxiv rau 75.3 kJ / mol, yog li cov tshuaj tiv thaiv halogenation feem ntau yog chlorination thiab bromination. Chlorination yog yooj yim dua ua dua bromination.
Iodine tsis tuaj yeem hloov nrog methane los ua iodomethane, tab sis nws cov tshuaj tiv thaiv rov qab tau yooj yim ua.
Los ntawm kev ntxiv iodine rau lub hauv paus saw cov tshuaj tiv thaiv, nws tuaj yeem nres cov tshuaj tiv thaiv.