Puas yog methyl benzoate polar lossis nonpolar?
Puas yog methyl benzoate polar lossis nonpolar?

Video: Puas yog methyl benzoate polar lossis nonpolar?

Video: Puas yog methyl benzoate polar lossis nonpolar?
Video: POCl3 полярный или неполярный? 2024, Kaum ib hlis
Anonim

Methyl benzoate hmoov muaj ester (-CO2R). Qhov kev txiav txim ntawm polarity Ntawm cov pab pawg ua haujlwm no yog raws li hauv qab no: aromatic hydrocarbons < ester < hydroxyl < carboxylic acid. Qhov no txhais tau tias biphenyl yog qhov tsawg tshaj plaws polar thiab yuav elute ua ntej, whereas benzoic acid yog feem ntau polar thiab yuav elute kawg.

Yog li, yog methyl benzoate soluble hauv dej?

Methyl benzoate yog ib qho ester nrog cov tshuaj formula C6H5COOCH3. Nws yog tsim los ntawm condensation ntawm methanol thiab benzoic acid . Nws yog xim tsis muaj xim rau cov kua daj me ntsis uas yog insoluble nrog dej, tab sis miscible nrog feem ntau cov kuab tshuaj organic.

Tsis tas li ntawd, koj yuav ua li cas methyl benzoate? Hauv qhov kev sim no koj yuav npaj methyl benzoate los ntawm reacting benzoic acid nrog methanol siv sulfuric acid ua catalyst. Txij li qhov no yog ib qho kev rov qab los, nws yuav ncav cuag qhov sib npaug uas tau piav qhia los ntawm qhov sib npaug tas li, Keq.

Ntawm no, tus qauv ntawm methyl benzoate yog dab tsi?

C8H8O2

Peb tuaj yeem hloov methyl benzoate rau benzoic acid li cas?

Qhov no yooj yim heev. Yog koj kho benzoic acid nrog sodium hydroxide mus rau ib qho kev daws teeb meem thiab cais cov resultant sodium tshuaj benzoate , thiab ua raws li nrog methyl chloride, sodium chloride yuav form thiab koj yuav muaj methyl benzoate hmoov ib yam nkaus.

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