2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Piv rau amines, amides yog tsis muaj zog hauv pausthiab tsis muaj cov ntsiab lus meej acid-base hauv dej. Ntawm qhov tod tes, amides yog cov hauv paus muaj zog dua li esters, aldehydes, thiab ketones.
Yog amides acid?
Acidity. Amides nrog N-H daim ntawv cog lus yog tsis muaj zog acidic, Ka li ib txwm muaj txog 10−16: Txawm li cas los xij, amides kom meej meej yog acidic ntau dua ammonia (Ka∼10−33), thiab qhov sib txawv no qhia txog qhov muaj txiaj ntsig zoo ntawm kev ruaj khov ntawm amide anion.
Puas yog amides yooj yim lossis nruab nrab?
Amides yog nruab nrab cov ntsiab lus - sib piv rau lawv cov txheeb ze ze, cov amines, uas yog qhov yooj yim. Qhov kev sib txuas ntawm amide yog kev npaj - txawm tias ib txwm peb qhia C-N txuas los ntawm ib daim ntawv cog lus, uas yuav tsum muab kev sib hloov dawb.
Puas yog amides hauv dej?
Zoo li cov esters, cov kev daws teeb meem ntawm amides hauv dej feem ntau yog nruab nrab- tsis yog acidic lossis yooj yim. Cov amides feem ntau muaj cov ntsiab lus kub kub thiab cov ntsiab lus melting. Cov yam ntxwv no thiab lawv cov dej solubility hauv dej yog tshwm sim los ntawm cov polar xwm ntawm pawg amide thiab hydrogen bonding (Daim duab 10.6. 1).
Puas yog amine lossis amide ntau acidic?
Amides yog acidic dua amines vim tias cov nitrogen hauv cov amines muaj ib khub ntawm cov electrons uas txais cov protons, whereas, hauv amides, pawg amide thiab carbonyl pawg yog bonded ua ke vim yog siab electronegativity ntawm oxygen uas ua rau nws tau koom nrogresonance, yog li ua rau nws tsis yooj yim …
Pom zoo:
Puas yog propanoic acid acidic lossis yooj yim?
Propanoic acid, CH3CH2COOH, yog carboxylic acid uas cuam tshuam nrog dej raws li qhov sib npaug saum toj no. Ntawm 25C pH ntawm 50.0 mL qauv ntawm 0.20 M CH3CH2COOH yog 2.79. YYuav ua li cas cov kua qaub yog propanoic acid? Propionic acid yog a luv-chain saturated fatty acid suav nrog ethane txuas rau cov pa roj carbon ntawm pawg carboxy.
Vim li cas amides tsis yog qhov yooj yim?
Yog vim li cas amides tsis yog qhov yooj yim yog vim muaj cov pa roj carbonyl pawg. Cov pab pawg carbonyl yog inherently electron rho tawm thiab yog li rub electron ceev kom deb ntawm pawg nitrogen. Tsis tas li ntawd, resonance delocalizes electron ceev los ntawm nitrogen.
In yooj yooj yim lub ntsiab lus irresistible?
adjective. Yog koj piav ib yam dab tsi xws li kev ntshaw lossis kev quab yuam li tsis muaj zog, koj txhais tau tias nws muaj zog heev uas nws ua rau koj ua ib yam, thiab tsis muaj ib yam dab tsi uas koj tuaj yeem tiv thaiv qhov no. Yuav ua li cas tsis tuaj yeem txhais tau li cas?
Suab paj nruag yog lo lus yooj yooj yim?
1: ib qho kev npaj ntawm lub suab muaj suab paj nruag, suab paj nruag, thiab feem ntau sib haum xeeb classical suab paj nruag. 2: kev kos duab ntawm kev ua kom zoo siab lossis kev nthuav qhia ua ke ntawm cov suab nrov tshwj xeeb nrog cov suab paj nruag, suab paj nruag, thiab feem ntau sib haum xeeb Kuv xav kawm suab paj nruag hauv tsev kawm qib siab.
Ntawm koj qhov yooj yim lossis rau koj qhov yooj yim?
Yog hais txog qhov yooj yim mus ua ntej, ces txhua lub sijhawm tuaj yeem siv rau qhov tseem ceeb: Koj tuaj yeem hu rau kuv ntawm koj qhov yooj yim - txhua lub sijhawm, nruab hnub lossis hmo ntuj. Raws li rau tej zaum vs. tuaj yeem, tej zaum yuav yog lo lus raug siv ntau dua (tsawg kawg hauv kev nkag siab zoo dua), tab sis tuaj yeem ua suab zoo dua hauv cov ntsiab lus tsis raug.
