Esters yog tsim thaum carboxylic acids rhuab nrog cawv nyob rau hauv muaj cov kua qaub catalyst. Cov catalyst feem ntau yog concentrated sulfuric acidCov roj hydrogen chloride qhuav yog siv rau qee kis, tab sis cov no feem ntau cuam tshuam nrog cov tshuaj tsw qab esters (cov uas muaj lub nplhaib benzene).
Puas carboxylic acids tsim esters?
Esters yog derived los ntawm carboxylic acids. Lub carboxylic acid muaj cov -COOH pawg, thiab nyob rau hauv ib tug ester hydrogen nyob rau hauv cov pab pawg neeg no yog hloov los ntawm ib tug hydrocarbon pawg ntawm tej yam.
Koj yuav hloov cov carboxylic acids li cas rau esters?
Kev hloov pauv ntawm ester rau hauv cov kua qaub yog ua tiav los ntawm lub hydrolysis ntawm ester nyob rau hauv muaj alkali nyob rau hauv cawv soln. nyob rau hauv reflux ces neutralization los ntawm acid ntsev kom tau carboxylic acid.
ester ua li cas?
Esters tshwm sim ib txwm - feem ntau yog rog thiab roj - tab sis lawv tuaj yeem tsim hauv chav kuaj by reacting cawv nrog cov organic acid. Ib me ntsis sulfuric acid yog xav tau los ua ib qho catalyst. Yog li, ua kom ethyl ethanoate, koj yuav tsum tau hnov ethanol nrog ethanoic acid.
Y Yuav ua li cas cov tshuaj tiv thaiv yog carboxylic acid rau ester?
Esters thiab dej yog tsim thaum cawv hnov mob nrog carboxylic acids. Cov tshuaj tiv thaiv no yog hu ua esterification, uas yog cov tshuaj tiv thaiv rov qab. Hom tshuaj tiv thaiv no yog hu ua cov tshuaj tiv thaiv condensation, uas txhais tau hais tias cov dej molecules raug tshem tawm thaum cov tshuaj tiv thaiv.
