Qhov sib txawv tseem ceeb ntawm azo thiab diazo yog lub sij hawm azo hais txog qhov muaj N=N pab pawg, whereas lub sij hawm diazo hais txog qhov muaj ib pab pawg azo ntawm lub davhlau ya nyob twg ntawm cov organic compound.
Azo thiab diazo yog ob nqe lus uas peb tuaj yeem nrhiav tau hauv thaj chaw ntawm cov organic chemistry. Lub sij hawm azo yog siv rau lub npe cov tebchaw uas muaj cov pab pawg ua haujlwm N=N, thiab yog tias pawg haujlwm no nyob ntawm lub davhlau ya nyob twg ntawm cov molecule, ces peb hu nws ua diazo compound.
Azo yog dab tsi?
Lo lus azo yog hais txog qhov muaj N=N pab pawg ua haujlwm. Hauv cov organic tebchaw, pawg haujlwm no tshwm sim hauv daim ntawv ntawm R-N=N-R 'qhov twg R thiab R' yog pawg alkyl lossis aryl pawg. Lub npe azo yog los ntawm lo lus azote, uas yog hais txog Fabkis lub npe rau nitrogen.
Daim duab 01: General Formula of Azo Compound
Aryl azo tebchaw yog qhov sib piv ruaj khov dua li alkyl azo tebchaw, thiab lawv feem ntau tshwm sim hauv daim ntawv crystalline. Piv txwv li, azobenzene muaj ob lub nplhaib benzene li R thiab R' ntawm azo compound. Nws feem ntau muaj nyob rau hauv daim ntawv trans isomer tab sis nws tuaj yeem hloov mus rau hauv cis isomer zoo li thaum lub teeb pom kev zoo. Azo coupling yog txheej txheem los ntawm peb tuaj yeem tsim cov azo tebchaw. Nws yog ib daim ntawv ntawm cov tshuaj tiv thaiv electrophilic.
Alkyl azo tebchaw muaj alkyl pawg txuas rau azo functional pawg. Peb tuaj yeem hu lawv aliphatic azo compounds. Ib qho piv txwv ntawm ib qho yooj yim alkyl azo compound yog diethyldiazene. Nws muaj ob pawg ethyl txuas nrog N=N pab pawg ua haujlwm.
Diazo yog dab tsi?
Lub sij hawm diazo yog hais txog qhov muaj ob lub nitrogen atoms txuas rau lub davhlau ya nyob twg ntawm cov organic compound. Cov qauv qauv dav dav rau cov khoom sib xyaw no yog R2C=N+=N– Ib Piv txwv ntawm ib qho yooj yim diazo compound yog diazomethane, uas muaj ib pab pawg neeg ua haujlwm azo txuas rau methane molecule.
Daim duab 02: Diazo Compounds
Cov diazo tebchaw no tuaj yeem ua raws li 1, 3-dipoles hauv cov tshuaj tiv thaiv cycloaddition. Tsis tas li ntawd, lawv tuaj yeem ua cov khoom ua ntej rau kev tsim cov carbene. Tsis tas li ntawd, lawv tuaj yeem hnov mob li nucleophiles hauv cov tshuaj tiv thaiv nucleophilic ntxiv. Thaum xav txog cov synthesis ntawm diazo tebchaw, peb tuaj yeem ua ke los ntawm amines, los ntawm diazomethyl compounds, ntawm diazo hloov, los ntawm hydrazones, thiab lwm yam.
Qhov txawv ntawm Azo thiab Diazo yog dab tsi?
Qhov sib txawv tseem ceeb ntawm azo thiab diazo yog lub sij hawm azo hais txog qhov muaj N=N pab pawg, thaum lub sij hawm diazo hais txog qhov muaj ib pab pawg azo ntawm lub davhlau ya nyob twg ntawm cov organic compound. Hauv azo tebchaw, N=N pab pawg ua haujlwm tshwm sim ntawm nruab nrab ntawm qhov sib xyaw uas ob lub ntsiab lus ntawm pawg ua haujlwm tau txuas nrog qee lwm pab pawg. Nyob rau hauv sib piv, nyob rau hauv diazo tebchaw, lub functional pab pawg neeg tshwm sim nyob rau hauv lub davhlau ya nyob twg ntawm lub compound. Cov tshuaj formula rau ib qho azo compound yog R-N=N=R ', thaum cov tshuaj formula ntawm ib tug diazo compound yog R2C=N+=N–
Muaj ob hom azo compounds li alkyl thiab aryl azo compounds. Ib qho piv txwv yooj yim ntawm aryl azo compound yog azobenzene. Ib qho piv txwv yooj yim ntawm diazo compound yog diazomethane.
Hauv qab infographic qhia txog qhov sib txawv ntawm azo thiab diazo.
Summary – Azo vs Diazo
Cov ntsiab lus azo thiab diazo tuaj yeem nyob hauv thaj chaw ntawm organic chemistry. Qhov sib txawv tseem ceeb ntawm azo thiab diazo yog lub sij hawm azo hais txog qhov muaj N=N pab pawg, thaum lub sij hawm diazo hais txog qhov muaj ib pab pawg azo ntawm lub davhlau ya nyob twg ntawm cov organic compound.
