Qhov Tseem Ceeb Qhov txawv - Txoj Haujlwm Isomerism vs Metamerism
Isomerism tuaj yeem txhais tau tias muaj cov tshuaj lom neeg sib xyaw uas muaj cov qauv qauv zoo ib yam tab sis txawv spatial kev npaj. Qhov no txhais tau tias, isomers muaj tib tus lej ntawm cov atoms hauv txhua lub caij, tab sis lawv txoj kev npaj sib txawv. Isomers feem ntau muab faib ua ob pawg npe hu ua isomers thiab stereoisomers. Cov txheej txheem isomers rov muab faib ua peb pawg raws li cov saw isomers, txoj haujlwm isomers, thiab pawg ua haujlwm isomers. Metamers kuj yog ib hom qauv isomers, tab sis lawv tsis tshua pom. Qhov sib txawv tseem ceeb ntawm txoj hauj lwm isomerism thiab metamerism yog tias, nyob rau hauv txoj hauj lwm isomerism, cov pab pawg ua haujlwm tau txuas mus rau cov haujlwm sib txawv whereas, hauv metamerism, cov pab pawg sib txawv alkyl txuas nrog tib pab pawg ua haujlwm.
Txoj Haujlwm Isomerism yog dab tsi?
Txoj haujlwm isomerism tuaj yeem txhais tau tias yog "kev txav" ntawm pawg ua haujlwm hauv cov molecule. Qhov no txhais tau hais tias, tsuas yog txoj haujlwm ntawm pawg ua haujlwm tau hloov pauv hauv hom isomerism. Tus naj npawb ntawm cov pa roj carbon atoms, cov mis mos molecular, cov qauv ntawm cov pob txha, thiab cov pawg ua haujlwm zoo ib yam rau isomers hauv txoj hauj lwm isomerism. Tab sis hom isomerism no tsis muaj nyob hauv cov tebchaw uas muaj cov pab pawg kawg xws li carboxylic acids, aldehydes, thiab lwm yam vim tias cov pab pawg no tsis tuaj yeem nyob hauv nruab nrab ntawm cov saw hlau.
Piv txwv li, propyl bromide thiab isopropyl bromide yog txoj haujlwm isomers. Hauv propyl bromide, pab pawg ua haujlwm yog -Br thiab nws txuas mus rau qhov kawg ntawm cov pa roj carbon saw hlau whereas hauv isopropyl bromide, -Br pawg txuas mus rau nruab nrab carbon atom ntawm cov saw hlau.
Daim duab 01: Txoj Haujlwm Isomerism hauv o-dichlorobenzene thiab p-dichlorobenzene
Metamerism yog dab tsi?
Thaum metamerism, hom alkyl pawg ntawm ob sab ntawm pawg ua haujlwm yuav txawv ntawm ib leeg. Nws yog ib qho kev faib tsis sib npaug ntawm carbon atoms. Metamerism belongs rau tib homologous series, uas txhais tau hais tias, tus naj npawb ntawm cov pa roj carbon atoms tuaj yeem nce zuj zus kom tau txais cov isomers sib txawv. Yog li, cov qauv sib txawv tsuas yog tus lej ntawm CH 2 pawg hauv cov saw hlau loj.
Alkyl pawg ib txwm txuas rau sab ntawm lub atom divalent xws li oxygen lossis sulfide, lossis pawg alkyl tuaj yeem txuas rau ib pawg divalent xws li -NH-. Metamerism tsis tshua pom vim cov kev txwv no. Yog li ntawd, feem ntau ntawm cov tebchaw pom nyob rau hauv metamerism yog ethers thiab amines.
Piv txwv li, diethyl ether thiab methyl propyl ether yog metamers. Ntawm no, pawg ua haujlwm yog ether thiab divalent atom yog oxygen atom. Diethyl ether muaj ob pawg ethyl thaum methyl propyl ether muaj methyl thiab ib pawg propyl ntawm ob sab ntawm cov pa atom.
Daim duab 02: Metamerism hauv Methyl propyl ether thiab Diethyl ether
Qhov txawv ntawm Txoj Haujlwm Isomerism thiab Metamerism yog dab tsi?
Txoj Haujlwm Isomerism vs Metamerism |
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| Nyob rau hauv txoj hauj lwm isomerism, txoj hauj lwm ntawm pawg neeg ua haujlwm txawv. | Hauv metamerism, hom alkyl pawg uas txuas nrog rau pawg ua haujlwm sib txawv. |
| Ntau tus Isomers | |
| Txoj haujlwm isomerism qhia ntau tus isomers uas txawv tsuas yog los ntawm txoj haujlwm ntawm pawg ua haujlwm | Metamerism muaj tsawg tus isomers vim nws cov kev txwv xws li pawg alkyl txuas rau cov atoms lossis pawg. |
| Tshwj xeeb ua haujlwm pab pawg | |
| Txoj hauj lwm isomerism tsis tuaj yeem pom hauv cov tebchaw muaj tsuas yog aldehyde, carboxylic zoo li cov pab pawg kawg. | Metamerism tuaj yeem pom tsuas yog hauv ethers lossis lwm cov tshuaj uas muaj cov atom sib txawv. |
| Alkyl Groups | |
| Tib pawg alkyl txuas nrog rau pawg ua haujlwm hauv isomers ntawm txoj haujlwm isomerism. | Ntau pawg alkyl txuas nrog rau pawg ua haujlwm hauv metamerism. |
| No belongs to a non-homologous series. | Ntawm no yog homologous series |
Summary – Txoj hauj lwm Isomerism vs Metamerism
Qhov sib txawv tseem ceeb ntawm txoj hauj lwm isomerism thiab metamerism yog tias, nyob rau hauv txoj hauj lwm isomerism, qhov chaw ntawm pawg neeg ua haujlwm tau hloov pauv qhov twg, hauv metamerism, hom alkyl pawg nyob rau sab ntawm pawg ua haujlwm tau hloov.
