Qhov txawv ntawm acetic acid thiab acetic anhydride yog acetic acid yog ib qho yooj yim carboxylic acid, whereas acetic anhydride yog lub cev qhuav dej ntawm acetic acid.
Acetic acid yog cov organic compound uas muaj cov tshuaj formula CH3COOH, thaum acetic anhydride yog cov organic compound uas muaj cov tshuaj formula (CH3CO) 2O. Peb tuaj yeem siv acetic acid los tsim acetic anhydride.
YAcetic Acid yog dab tsi?
Acetic acid yog cov organic compound uas muaj cov tshuaj formula CH3COOH. Nws yog qhov yooj yim thib ob carboxylic acid. Cov kua qaub no tshwm sim raws li cov kua tsis muaj xim uas muaj pungent, vinegar zoo li tsw. Tsis tas li ntawd, acetic acid muaj qhov txawv qaub saj thiab. Cov tshuaj no muaj ib pawg methyl txuas nrog carboxylic acid. Nws yog ib tug tsis muaj zog acid vim nws dissociates ib feem nyob rau hauv ib tug aqueous tov. Cov molar loj ntawm acetic acid yog 60.05 g / mol. Lub hauv paus conjugate ntawm cov kua qaub no yog acetate ion. Ntxiv mus, lub systemic IUPAC lub npe ntawm acetic acid yog ethanoic acid.
Daim duab 01: Cov qauv ntawm pob txha ntawm Acetic Acid
Nyob rau hauv nws daim ntawv, acetic acid tsim chains los ntawm interconnecting lub molecules los ntawm hydrogen bonds. Nyob rau hauv nws vapor theem, muaj dimers ntawm acetic acid. Tsis tas li ntawd, hauv nws lub xeev ua kua, nws yog hydrophilic protic hnyav. Ntawm physiological pH tej yam kev mob, cov compound no muaj nyob rau hauv ib tug tag nrho ionized daim ntawv li acetate. Peb tuaj yeem tsim cov acetic acid hauv ob qho tib si hluavtaws thiab cov kab mob fermentation. Ntxiv rau cov no, nyob rau hauv txoj kev hluavtaws, acetic acid yog tsim los ntawm methanol carbonylation.
Peb tuaj yeem tsim cov acetic acid hauv kev lag luam hluavtaws lossis los ntawm kev lom neeg. Piv txwv li, peb tuaj yeem tsim cov acetic acid los ntawm carbonylation ntawm methanol, thiab peb tuaj yeem tsim cov kua qaub no los ntawm fermentation ntawm cov noob xws li kua cider, siv qos yaj ywm, mov, thiab lwm yam.
Acetic Anhydride yog dab tsi?
Acetic anhydride yog cov organic compound uas muaj cov tshuaj formula (CH3CO) 2O. Nws tseem hu ua ethanoic anhydride. Peb tuaj yeem sau nws li ac2O. Acetic anhydride yog qhov yooj yim tshaj plaws ntawm cov anhydride sib xyaw ntawm carboxylic acid.
Cov tshuaj no tau siv dav los ua cov reagent rau cov txheej txheem organic synthesis. Nws tshwm sim raws li cov kua tsis muaj xim uas muaj cov ntxhiab tsw muaj zog acetic acid. Cov ntxhiab tsw muaj zog no vim yog cov tshuaj tiv thaiv ntawm acetic anhydride thiab noo noo hauv huab cua.
Daim duab 02: Acetic Acid Condensation
Zoo ib yam li lwm cov tshuaj acid anhydride, acetic anhydride yog ib qho yooj yim compound uas muaj cov qauv nonplanar. Nws muaj qhov sib txuas ntawm pi uas tsim los ntawm lub hauv paus oxygen atom, uas muaj qhov tsis muaj zog resonance stabilization dua li dipole-dipole repulsion ntawm ob lub carbonyl oxygen atoms.
Peb tuaj yeem tsim acetic anhydride los ntawm cua sov potassium acetate nrog benzoyl chloride. Industrially, nws yog tsim los ntawm carbonylation ntawm methyl acetate. Txawm li cas los xij, vim nws tus nqi qis, cov chaw kuaj mob feem ntau tsis npaj acetic anhydride rau kev tshawb fawb siv; xwb, lawv yuav los ntawm lwm tus neeg muab khoom.
Dab tsi zoo sib xws ntawm Acetic Acid thiab Acetic Anhydride?
- Acetic acid thiab acetic anhydride yog acidic compounds.
- Lawv muaj carbonyl carbon atoms.
- ob leeg yog cov tsis muaj kev sib txuas.
- Lawv muaj li cov kua tsis muaj xim muaj ntxhiab tsw.
Qhov txawv ntawm Acetic Acid thiab Acetic Anhydride yog dab tsi?
Acetic acid yog cov organic compound uas muaj cov tshuaj formula CH3COOH, thaum acetic anhydride yog cov organic compound uas muaj cov tshuaj formula (CH3CO) 2O. Qhov sib txawv tseem ceeb ntawm acetic acid thiab acetic anhydride yog acetic acid yog ib qho yooj yim carboxylic acid, whereas acetic anhydride yog lub cev qhuav dej ntawm acetic acid.
Cov hauv qab no qhia txog qhov sib txawv ntawm acetic acid thiab acetic anhydride hauv daim ntawv tabular rau ib sab ntawm kev sib piv.
Summary – Acetic Acid vs Acetic Anhydride
Acetic acid thiab acetic anhydride yog cov ntsiab lus tseem ceeb hauv kev lag luam. Peb tuaj yeem siv acetic acid los tsim acetic anhydride. Qhov sib txawv tseem ceeb ntawm acetic acid thiab acetic anhydride yog acetic acid yog ib qho yooj yim carboxylic acid, whereas acetic anhydride yog lub cev qhuav dej ntawm acetic acid.
