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 …
