Qhov sib txawv tseem ceeb ntawm alkoxide thiab phenoxide yog alkoxide tsim thaum cov hydrogen atom ntawm pawg cawv raug tshem tawm, qhov phenoxide tsim thaum peb tshem cov hydrogen atom los ntawm -OH pawg ntawm phenol molecule.
Ob leeg alkoxide thiab phenoxide yog anions, thiab lawv yog ib qho tseem ceeb raws li pab pawg ua haujlwm hauv cov tshuaj synthesis tshuaj. Lub alkoxide anion yog lub hauv paus conjugate ntawm txhua yam cawv, tab sis phenoxide anion yog lub hauv paus ntawm phenol.
Alkoxide yog dab tsi?
Cov alkoxide yog ib qho anion uas tsim thaum peb tshem cov hydrogen atom los ntawm -OH pawg ntawm cawv. Yog li ntawd, nws yog lub hauv paus conjugate ntawm cawv. Peb tuaj yeem sau cov qauv dav dav ntawm alkoxide li RO-. R yog cov organic hloov pauv. Piv txwv li, yog tias peb muaj ib pab pawg methyl nyob ntawd, ces cov alkoxide hu ua methoxide.
Daim duab 01: Cov qauv ntawm Methoxide Anion
Alkoxide tuaj yeem ua lub hauv paus muaj zog. Thaum cov pab pawg R yog ib pawg alkyl yooj yim (tsis yog pawg loj), alkoxides tuaj yeem ua tau zoo nucleophiles thiab li ligands. Txawm li cas los xij, cov anions no tsis ruaj khov hauv cov kuab tshuaj protic, piv txwv li dej.
Feem ntau, cov alkali hlau alkoxide tshwm sim raws li cov tshuaj polymeric yog tias R pawg me me. Tsis tas li ntawd, alkoxide anion tuaj yeem ua raws li kev sib txuas zoo ligand thiab. Muaj ob peb txoj hauv kev uas peb tuaj yeem npaj cov alkoxides. Piv txwv li, peb tuaj yeem tsim lawv los ntawm kev txo cov hlau, electrophilic chlorides, cov tshuaj tiv thaiv metathesis, thiab ntawm cov txheej txheem electrochemical, thiab lwm yam. Thaum xav txog kev siv, alkoxides-muaj cov hlau hloov pauv muaj txiaj ntsig zoo hauv cov txheej txheem thiab ua cov catalysts.
YPhenoxide yog dab tsi
Phenoxide yog ib qho anion uas tsim thaum peb tshem cov hydrogen atom los ntawm -OH pawg ntawm phenol. Yog li ntawd, nws yog lub hauv paus conjugate ntawm phenol. Yog tias peb hloov cov atom hydrogen los ntawm lwm lub atom, peb tuaj yeem tau txais cov khoom siv tshiab. Piv txwv li, yog tias peb hloov cov hydrogen atom los ntawm sodium atom, peb tau txais sodium phenoxide.
Daim duab 02: Cov qauv ntawm Phenoxide Anion nrog Sodium; Sodium Phenoxide
Cov tshuaj formula rau cov anion no yog C6H5O–. Phenol yog acidic, tab sis phenoxide yog qhov yooj yim vim nws nyiam txais cov protons vim qhov tsis zoo ntawm cov pa oxygen atom ntawm phenoxide anion.
Qhov txawv ntawm Alkoxide thiab Phenoxide yog dab tsi?
Ob leeg alkoxide thiab phenoxide yog anions thiab lawv yog ib qho tseem ceeb ua pab pawg ua haujlwm hauv cov tshuaj sib xyaw ua ke. Qhov sib txawv tseem ceeb ntawm alkoxide thiab phenoxide yog alkoxide tsim thaum cov hydrogen atom ntawm pawg cawv raug tshem tawm, thaum phenoxide tsim thaum peb tshem cov hydrogen atom los ntawm -OH pawg ntawm phenol molecule. Yog li ntawd, alkoxide anion yog conjugate puag ntawm txhua yam cawv, tab sis phenoxide anion yog lub hauv paus ntawm phenol.
Ob qho tib si no anions yog cov ntsiab lus yooj yim vim tias lawv nyiam kom tau txais cov protons los ntawm sab nraud kom tsis txhob muaj qhov tsis zoo. Ntxiv mus, alkoxide anion yog pab tau raws li ib tug bridging ligand. Lub caij no, phenoxide yog qhov tseem ceeb hauv cov organic synthesis tshuaj ntxiv rau lub nplhaib benzene rau lwm cov tshuaj moiety. Cov tshuaj formula rau alkoxide anion yog RO-, thaum rau phenoxide anion cov tshuaj formula yog C6H5O-
Hauv qab infographic qhia txog qhov sib txawv ntawm alkoxide thiab phenoxide.
Summary – Alkoxide vs Phenoxide
Hauv cov ntsiab lus, ob qho tib si alkoxide thiab phenoxide yog cov anions, thiab lawv yog ib qho tseem ceeb ua pab pawg ua haujlwm hauv cov tshuaj sib xyaw ua ke. Qhov sib txawv tseem ceeb ntawm alkoxide thiab phenoxide yog cov alkoxide tsim thaum cov hydrogen atom ntawm pawg cawv raug tshem tawm, thaum phenoxide tsim thaum peb tshem cov hydrogen atom los ntawm -OH pawg ntawm phenol molecule.
