Qhov sib txawv tseem ceeb ntawm oxo thiab formyl yog lub sij hawm oxo hais txog cov pa oxygen atom txuas rau lub molecule whereas lub sij hawm formyl yog hais txog ib pawg –CHO txuas rau ib lub molecule.
Oxo thiab formyl yog pawg ua haujlwm hauv cov organic sib txuas. Yog li ntawd, cov no yog moieties ntawm organic molecules. Cov pab pawg ua haujlwm no feem ntau txuas nrog carbon atoms. Cov khoom siv tshuaj lom neeg thiab lub cev ntawm cov organic tebchaw yog txiav txim los ntawm cov pab pawg ua haujlwm no.
Oxo yog dab tsi?
Lo lus oxo yog hais txog ib pab pawg ua haujlwm uas muaj tib lub atom oxygen. Feem ntau, pawg oxo tuaj yeem pom nyob rau hauv carbonyl tebchaw uas cov pa atom khi rau carbon atom los ntawm ob daim ntawv cog lus. Nov yog pab pawg ua haujlwm, thiab peb tuaj yeem sau nws ua "=O".
Daim duab 1: Cov qauv ntawm Carbonyl Compound muaj Oxo Functional Group
Muaj ntau chav kawm ntawm oxo compounds (carbonyl compounds) xws li aldehydes, ketones, carboxylic acids, thiab amides. Hauv cov tebchaw no, cov pa oxygen yog electronegative ntau dua li cov pa roj carbon atom nws txuas nrog; Yog li, pawg oxo ua rau cov khoom sib txuas no ua kom pom kev resonance. Lub peev xwm los tsim cov qauv resonance tuaj yeem cuam tshuam cov reactivity ntawm cov molecule. C=O daim ntawv cog lus nyob rau hauv pawg oxo yog ib tug polar daim ntawv cog lus, thiab siab electronegativity ntawm oxygen atom ua rau nws nyiam cov nyiaj electrons rau nws tus kheej, ua rau cov pa roj carbon atom me ntsis zoo them. Yog li ntawd, cov pa roj carbon atoms txuas rau pawg oxo ua ib qho electrophile.
Formyl yog dab tsi?
Formyl yog ib pab pawg ua haujlwm muaj cov tshuaj formula -CHO. Cov pab pawg ua haujlwm no muaj lub chaw carbonyl. Thaum ib pab pawg R txuas nrog rau pawg ua haujlwm no, peb muab nws lub npe hu ua aldehyde. Cov pab pawg R tuaj yeem yog aliphatic lossis aromatic; feem ntau, nws yog ib pawg alkyl. Piv txwv li, qhov yooj yim tshaj plaws compound uas muaj ib pab pawg neeg formyl yog formaldehyde. Nws yog ib qho aldehyde compound uas tsim los ntawm pawg formyl txuas nrog hydrogen atom. Cov tshuaj formula ntawm formaldehyde yog HCOH.
Daim duab 02: Formaldehyde muaj Formyl Group txuas nrog Hydrogen Atom
Ib pawg formyl ib txwm tshwm sim ntawm qhov kawg ntawm lub molecule. Nws tsis tuaj yeem tshwm sim hauv nruab nrab ntawm cov molecule (vim tias ib qho kawg ntawm pawg formyl muaj hydrogen atom uas tsis tuaj yeem tsim lwm daim ntawv cog lus uas tsis yog nws ib daim ntawv cog lus nrog carbonyl carbon atom).
Feem ntau, cov pab pawg formyl yog qhov muaj zog heev. Yog li ntawd, nws nyiam koom nrog ntau qhov kev tawm tsam. E.g. condensation cov tshuaj tiv thaiv. Thaum txo cov pab pawg formyl, nws tsim cov cawv thawj. Ib yam li ntawd, thaum oxidation, nws nkag siab oxidizes rau carboxylic acids.
Qhov txawv ntawm Oxo thiab Formyl yog dab tsi?
Qhov sib txawv tseem ceeb ntawm oxo thiab formyl yog tias lo lus oxo hais txog cov pa oxygen atom txuas rau lub molecule whereas lub sij hawm formyl yog hais txog ib pawg –CHO txuas rau ib lub molecule. Ntxiv mus, ib pawg oxo ib txwm tshwm sim nyob rau hauv nruab nrab ntawm cov molecule thaum ib pawg formyl ib txwm tshwm sim nyob rau hauv lub terminus ntawm lub molecule.
Cov lus hauv qab no qhia txog qhov sib txawv ntawm oxo thiab formyl.
Summary – Oxo vs Formyl
Oxo thiab formyl yog pawg ua haujlwm hauv cov organic molecules. Qhov sib txawv tseem ceeb ntawm oxo thiab formyl yog tias lo lus oxo hais txog cov pa oxygen atom txuas rau lub molecule whereas lub sij hawm formyl yog hais txog ib pawg -CHO txuas rau ib lub molecule.
