-NH2 pawg hauv aniline yog o thiab p- directing nyob rau hauv cov xwm raws li nws nce electron ceev ntawm o- thiab p- txoj hauj lwm vim resonance.
Vim li cas NH2 pawg hauv aniline yog ortho thiab para directing ntawm electrophilic aromatic hloov?
NH2 pab pawg hauv aniline yog ortho thiab para guiding pawg vim vim muaj suab nrov, lawv yuav tso cov hluav taws xob rau lub nplhaib thiab tib lub sijhawm tshem tawm cov electrons ntawm lawv tus kheej vim +1 cuam tshuam los ntawm lub nplhaib aromatic. … Tus hloov pauv yog hu ua pawg tswj hwm meta yog tias pom qhov tsis sib xws.
Puas yog NH2 pawg meta directing?
Nyob rau hauv NH2 cov nitrogen txuas rau lub nplhaib benzene muaj ntau tshaj ntawm electron li no nws yog + R directing pawg. Thaum nyob rau hauv NO2 cov nitrogen txuas rau lub nplhaib benzene tsis muaj ib khub ntawm electrons ntxiv li nws yog -R effecting pab pawg uas yog meta directing.
Vim li cas NH2 yog ortho thiab directing group?
Yog li, pawg amino xws li −NH2 tam sim no hauv aniline yog ib pawg muaj zog ua kom muaj zog thiab yog ortho thiab para directing vim rau nws muaj zog +R nyhuv. … Vim hais tias ntawm no, muaj zog acidic tej yam kev mob raug siv vim hais tias ib co ntawm cov aniline molecules tau protonated rau anilinium ion.
Yuav ua li cas thiaj li muaj txiaj ntsig ntawm NH2 pawg hauv aniline tswj tau?
Teb: Cov txiaj ntsig ntawm -NH 2 pab pawg tuaj yeem tswj hwm los ntawm tiv thaiv -NH2 pab pawg los ntawm acetylation nrogacetic anhydride, thiab tom qab ntawd ua tiav qhov kev hloov pauv uas xav tau ua raws li hydrolysis ntawm cov hloov pauv amide mus rau qhov hloov pauv amine.
