Puas yog Cl A zoo dua nucleophile dua li Br?
Puas yog Cl A zoo dua nucleophile dua li Br?

Video: Puas yog Cl A zoo dua nucleophile dua li Br?

Video: Puas yog Cl A zoo dua nucleophile dua li Br?
Video: Yog Los Mas X Koj Yog Ib Puas Tsam Yam X Yog Tsis Muaj Koj Nyob Nrog Kuv (KevinCLYang Mashup Cover) 2024, Kaum ib hlis
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#468 hauv 1001 hauv Orgo Chem Examkrackers hais tias Br - yog a zoo nucleophile tshaj Cl -, tab sis #458 hais tias Br - yog a zoo tawm hauv pab pawg tshaj Cl -. zoo li koj hais Br - yog loj dua dua li Cl - thiab tuaj yeem yog li ntawd zoo dua stabilize tus nqi tsis zoo, ua rau nws a zoo dua tawm hauv pab pawg.

Yog li ntawd, Br lossis kuv Nucleophile puas zoo dua?

Iodine yog qhov tsawg kawg nkaus electronegative hauv halogens. Yog li ntawd, nws tuaj yeem yooj yim pub ib khub ntawm electron thiab yog li ua ib qho zoo nucleophile . Whereas, bromine yog qhov me me piv rau iodine yog li nws yuav tuav cov electrons ntau nruj. Yog li ntawd, nws yog ib qho nyuaj rau bromine kom poob electrons.

Tom qab ntawd, lo lus nug yog, Kuv puas yog Nucleophile zoo? Kuv - yog ib tug muaj zog nucleophile vim nws yog polarizable, ua rau nws ceev rau nws orbitals sib tshooj nrog cov electrophile. Nco ntsoov tias qhov pib yog lub tswv yim thermodynamic thiab nucleophilicity yog lub tswv yim kinetic.

Ib yam li ntawd, tib neeg nug, vim li cas iodine yog nucleophile zoo dua li bromine?

iodide ion yog a zoo nucleophile vim nws muaj atomic radius loj. Yog li ntawd, kuv yog ib tug zoo nucleophile thiab a zoo nucleophile tshaj F-, Cl-, thiab Br- raws li nws muaj peev xwm pub tau ib khub ntawm nws sab nraud electrons rau ib qho electrophile, tsim ib daim ntawv cog lus dative covalent.

Dab tsi reagent yog Nucleophile zoo?

NH2(-) zoo dua nucleophile mas NH3. HS(-) zoo dua nucleophile tshaj H2S. Qhov ntau dua qhov tsis zoo, qhov ntau dua ib lub atom yuav tso nws ob lub electrons los ua ib daim ntawv cog lus.

Pom zoo: