Halogens yog electronegative heev. Qhov no txhais tau hais tias inductively lawv yog electron rho tawmTxawm li cas los xij, vim lawv muaj peev xwm pub dawb ib leeg ntawm electrons hauv cov ntawv resonance, lawv yog activators thiab ortho / para directing. … Vim tias lawv yog electron rho tawm, halogens yog cov activators tsis muaj zog heev.
Puas halogens deactivating pawg?
Halogens yog ib qho exception ntawm pab pawg deactivating uas coj cov ortho lossis para hloov. Cov halogens deactivate lub nplhaib los ntawm inductive nyhuv tsis yog los ntawm lub resonance txawm tias lawv muaj ib tug unpaired khub ntawm electrons.
Vim li cas halogens me ntsis deactivating?
Halogens bonded rau benzene nplhaib muaj peb leeg ib khub. Peb cov khoom siv hluav taws xob no tuaj yeem ua rau resonance hauv benzene nplhaib. Tab sis, halogens kuj yog electronegative heev thiab yog li lawv muaj zog -I effect. Yog li, lawv tab tom deactivating pab pawg.
Puas halogens electron pub dawb lossis rho tawm?
o Halogens: Lub electronegativity ntawm halogen ua rau nws ua ib qho electron tshem tawm pawg ntawm cov nyhuv inductive. Halogens yog EWG txawm tias lawv muaj ib khub tam sim no.
Puas yog chlorine ua kom lossis tsis ua haujlwm?
Cov khub ib leeg ntawm ib qho hluav taws xob hauv chlorine atom stabilizes nruab nrab carbocation vim resonance. Txij li thaum- Kuv cov tshuaj chlorine muaj zog dua li nws + R cov nyhuv li no Cl ua rau net deactivation.
