Qhov txawv ntawm malic acid thiab maleic acid yog malic acid yog saturated dicarboxylic acid, whereas maleic acid yog unsaturated dicarboxylic acid.
Malic acid thiab maleic acid yog dicarboxylic acids. Qhov no txhais tau hais tias cov tebchaw no muaj ob pawg carboxyl (-COOH) nyob rau hauv tib lub molecule, txuas rau ob hom carbon atoms. Qhov sib txawv ntawm malic acid thiab maleic acid nyob ntawm qhov saturation (muaj ob lossis peb daim ntawv cog lus txhais tau tias tsis txaus). Txij li thaum maleic acid muaj ob daim ntawv cog lus ntawm ob lub atoms, nws yog ib qho tsis txaus ntseeg. Tab sis tsis muaj ob lossis triple bonds ntawm carbon atoms ntawm malic acid.
Malic Acid yog dab tsi?
Malic acid yog ib qho organic compound uas muaj cov tshuaj formula C4H6O5 Nws poob rau hauv qeb ntawm dicarboxylic acids vim nws muaj ob pawg -COOH ntawm ob lub davhlau ya nyob twg. Muaj ob stereoisomers ntawm malic acid: L thiab D isomers. Tab sis tsuas yog L isomers nyob ib txwm muaj. Qhov nyiam IUPAC lub npe ntawm cov tshuaj no yog 2-Hydroxybutanedioic acid. Cov qauv tshuaj ntawm cov tshuaj no yog raws li nram no:
Daim duab 01: Malic Acid Chemical Structure
Yuav luag txhua yam kab mob muaj sia tuaj yeem tsim cov tshuaj no hauv lawv lub cev. Cov qaub saj ntawm qee cov txiv hmab txiv ntoo yog tshwm sim los ntawm malic acid. Yog li ntawd, nws yog ib qho tseem ceeb raws li ib tug khoom noj khoom haus additives. Lub anion ntawm malic acid yog malate anion. Malic acid raug cais thawj zaug los ntawm cov kua txiv apple. Lub qaub ntawm cov kua txiv hmab txiv ntoo yog vim muaj cov malic acid nyob rau hauv siab concentrations.
Kev tsim cov tshuaj malic acid hauv kev lag luam yuav tsum muaj kev sib tw racemic ntawm ob lub stereoisomers ntawm malic acid. Peb tuaj yeem ua qhov kev npaj no los ntawm hydration ntawm maleic anhydride. Tom qab ntawd, peb tuaj yeem cais cov enantiomers ntawm ib leeg los ntawm kev daws teeb meem chiral.
Maleic Acid yog dab tsi?
Maleic acid yog cov organic compound uas muaj cov tshuaj HO2CCH=CHCO2H. Nws yog dicarboxylic acid uas muaj ob pawg carboxyl (-COOH pawg) txuas rau ob lub sib txawv carbon atoms. Maleic acid yog cis isomer ntawm butenedioic acid whereas fumaric acid yog trans isomer. Cov molar mass ntawm no compound yog 116 g / mol. Nws zoo nkaus li cov khoom dawb. Tsis tas li ntawd, qhov sib xyaw no tsis ruaj khov dua piv rau fumaric acid, tab sis nws yog qhov sib piv ntau dua dej-soluble.
Daim duab 02: Cov Qauv Tshuaj ntawm Maleic Acid
Cov khoom ntawm cov txiv neej acid yog txiav txim siab los ntawm kev sib koom ua ke ntawm intramolecular hydrogen. Hauv kev lag luam nplai, peb tuaj yeem tsim cov txiv neej acid ntawm hydrolysis ntawm maleic anhydride. Muaj ntau ntau yam kev siv cov txiv neej acid: raws li raw khoom rau zus tau tej cov tshuaj sib txawv xws li glyoxylic acid, raws li ib tug adhesion txhawb rau txawv substrates, siv nyob rau hauv zus tau tej cov tshuaj sib txawv tshuaj, thiab lwm yam.
Qhov txawv ntawm Malic Acid thiab Maleic Acid yog dab tsi?
Malic acid thiab maleic acid yog ob hom dicarboxylic acids. Malic acid yog ib qho organic compound uas muaj cov tshuaj formula C4H6O5 thaum txiv neej acid yog ib qho organic compound muaj cov tshuaj formula HO2CCH=CHCO2H. qhov sib txawv tseem ceeb ntawm malic acid thiab maleic acid yog malic acid yog ib qho saturated dicarboxylic acid, whereas maleic acid yog unsaturated dicarboxylic acid.
Malic acid yog tsim los ntawm hydration ntawm maleic anhydride thaum cov txiv neej acid yog tsim los ntawm tib lub compound ntawm hydrolysis. Yog li, qhov no yog lwm qhov sib txawv ntawm malic acid thiab maleic acid. Tsis tas li ntawd, daim ntawv thov loj ntawm malic acid yog raws li cov khoom noj ntxiv. Muaj ntau yam kev siv tseem ceeb ntawm cov txiv neej acid, suav nrog kev tsim cov tshuaj tshuaj, lwm yam tshuaj thiab lwm yam. whereas maleic acid yog siv los ua raw khoom.
Summary – Malic Acid vs Maleic Acid
Hauv cov ntsiab lus, malic acid thiab maleic acid yog ob qho sib txawv dicarboxylic acids. Qhov sib txawv tseem ceeb ntawm malic acid thiab maleic acid yog malic acid yog saturated dicarboxylic acid whereas maleic acid yog unsaturated dicarboxylic acid.
