Esterification ntawm phenol Koj yuav nco ntsoov tias koj tuaj yeem ua esters los ntawm cawv los ntawm kev ua rau lawv nrog carboxylic acids … Txawm li cas los xij, tsis zoo li cawv, phenol reacts qeeb nrog carboxylic acids uas koj. ib txwm ua rau nws nrog acyl chlorides (acid chlorides) lossis acid anhydrides xwb.
YPob phenols tsim esters?
Zoo li lwm yam cawv phenol tuaj yeem tsim esters, tab sis nws tsis cuam tshuam ncaj qha nrog carboxylic acids. Phenol tsuas tuaj yeem tsim cov ester yog tias nws tau hnov mob nrog cov kua qaub anhydride lossis acyl chloride.
Vim li cas phenol tsis pom cov tshuaj tiv thaiv esterification?
Phenol tuaj yeem tsim cov esters, zoo li lwm yam cawv, tab sis nws tsis cuam tshuam ncaj qha nrog carboxylic acids Phenol tsuas tuaj yeem tsim cov ester yog tias siv cov kua qaub anhydride lossis acyl chloride los ua rau nws. Los ntawm kev ua kom zoo delocalization ntawm cov nqi tsis zoo, cov carboxylate ion generated yog stabilized los ntawm resonance.
Puas phenol daim ntawv ester nrog carboxylic acid?
Phenol, zoo li lwm yam cawv, tuaj yeem tsim esters, tab sis nws tsis cuam tshuam ncaj qha nrog carboxylic acids. Tsuas yog cov kua qaub anhydride lossis acyl chloride tuaj yeem hnov mob nrog phenol los ua tus ester.
Vim li cas cawv thiaj tuaj yeem ua rau carboxylic acids tsim esters thaum phenols Tsis tuaj yeem?
Ua esters los ntawm carboxylic acids
Txoj kev no tuaj yeem siv los hloov cov cawv rau hauv esters, tab sis nws tsis ua haujlwm nrog phenols - cov tebchaw uas pawg -OH txuas ncaj qha rau lub nplhaib benzene. Phenols hnov mob nrog carboxylic acids yog li qeeb uas cov tshuaj tiv thaiv siv tsis tau rau kev npaj.
