Qhov sib txawv tseem ceeb ntawm DMF thiab DMSO yog DMF yog ib qho amide, whereas DMSO yog ib qho organosulfur compound.
Lo lus DMF sawv cev rau dimethyl formamide thaum DMSO sawv cev rau dimethyl sulfoxide. Ob lub tebchaw no muaj ob pawg methyl txuas rau tib lub atom ntawm ib pab pawg ua haujlwm. Cov pab pawg ua haujlwm hauv DMF yog pab pawg amide, thaum pab pawg ua haujlwm ntawm DMSO yog pawg oxide.
DMF yog dab tsi?
Lub sij hawm DMF sawv cev rau dimethyl formamide. Nws yog cov organic compound uas muaj cov tshuaj formula (CH3)2NC(O)H. Cov tshuaj no tshwm sim raws li cov kua tsis muaj xim uas yog miscible nrog dej thiab feem ntau lwm cov kuab tshuaj organic. Cov kua no kuj tseem siv tau los ua cov kuab tshuaj rau cov tshuaj lom neeg. Qhov no yog vim nws qhov polar xwm.
DMF suav tias yog cov kuab tshuaj aprotic nrog rau qhov kub kub. Yog li, cov kuab tshuaj no tuaj yeem pab txhawb SN2 cov tshuaj tiv thaiv. DMF feem ntau tsis muaj ntxhiab tsw, tab sis qee qib ntawm cov kua no yuav muaj cov ntxhiab tsw tsw vim muaj cov impurities xws li dimethylamine. Cov impurities no tuaj yeem raug tshem tawm ntawm sparging degraded qauv ntawm DMF nrog inert gas, xws li. argon roj, lossis los ntawm sonication ntawm cov qauv hauv qab txo qhov siab.
Daim duab 01: Cov Qauv Tshuaj ntawm DMF
Thaum xav txog cov qauv tshuaj ntawm DMF, nws muaj ib feem ntawm daim ntawv cog lus hauv C-N thiab C-O daim ntawv cog lus. Cov tshuaj no tuaj yeem tau txais hydrolyzed nyob rau hauv lub xub ntiag ntawm muaj zog acids thiab bases ntawm kub kub. Tsis tas li ntawd, nyob rau hauv lub xub ntiag ntawm sodium hydroxide, cov compound no hloov mus rau hauv formate thiab dimethylamine. Ntxiv mus, DMF tuaj yeem ua rau decarbonylation ntawm qhov kub thiab txias ze ntawm qhov kub ntawm DMF, tsim dimethylamine. Yog li ntawd, yog tias peb tab tom ua cov txheej txheem distillation siv cov kua no, nws yuav tsum tau ua ntawm qhov txo qis thiab qis kub.
DMF tuaj yeem tsim los ntawm kev sib xyaw ntawm methyl formate nrog dimethylamine. Lwm txoj kev yog ua cov tshuaj tiv thaiv ntawm dimethylamine nrog carbon monoxide. Tsis tas li ntawd, DMF tuaj yeem npaj los ntawm supercritical carbon dioxide siv ruthenium-based catalysts.
DMSO yog dab tsi?
Lub sij hawm DMSO sawv cev rau dimethyl sulfoxide muaj cov tshuaj formula (CH3) 2SO. Nws tshwm sim raws li cov kua tsis muaj xim. Cov kua no yog ib qho tseem ceeb ntawm cov polar aprotic hnyav uas tuaj yeem yaj ob lub teb chaws polar thiab nonpolar. Tsis tas li ntawd, cov kua no yog miscible nrog ntau yam ntawm cov organic solvents nrog rau cov dej. DMSO muaj qhov kub siab heev. Ntxiv mus, nws muaj qhov txawv txav zoo li qej hauv lub qhov ncauj tom qab kev sib cuag nrog daim tawv nqaij.
Daim duab 02: Cov qauv tshuaj ntawm DMSO
Thaum xav txog cov qauv ntawm DMSO molecule, nws muaj Cs symmetry thiab trigonal pyramidal molecular geometry. Muaj ib khub electron uas tsis yog khi rau ntawm kwv yees li tetrahedral sulfur atom. Cov tshuaj formula ntawm DMSO yog C2H6OS. Nws tshwm sim ua kua tsis muaj xim.
Hauv kev tsim khoom lag luam, DMSO tau npaj los ntawm dimethyl sulfide, uas yog cov khoom siv los ntawm cov txheej txheem Kraft. Cov txheej txheem no suav nrog cov tshuaj tiv thaiv oxidation uas tshwm sim nrog cov pa oxygen lossis nitrogen dioxide gas.
Qhov txawv ntawm DMF thiab DMSO yog dab tsi?
DMF yog dimethyl formamide thaum DMSO yog dimethyl sulfoxide. Ob leeg yog cov organic tebchaw. Qhov sib txawv tseem ceeb ntawm DMF thiab DMSO yog DMF yog ib qho amide, whereas DMSO yog ib qho organosulfur compound.
DMF yog npaj los ntawm kev sib txuas methyl formate thiab dimethylamine los yog los ntawm cov tshuaj tiv thaiv ntawm dimethylamine thiab carbon monoxide thaum DMSO yog npaj los ntawm dimethyl sulfide, uas yog ib tug byproduct ntawm Kraft txheej txheem. Ntxiv mus, DMF muaj tshuaj lom ntau dua DMSO.
Hauv qab infographic muab cov ncauj lus kom ntxaws ntxiv ntawm qhov sib piv ntawm ob qho tib si kom pom qhov sib txawv ntawm DMF thiab DMSO yooj yim.
Summary – DMF vs DMSO
DMF yog dimethyl formamide thaum DMSO yog dimethyl sulfoxide. Ob leeg yog cov organic tebchaw. Qhov sib txawv tseem ceeb ntawm DMF thiab DMSO yog DMF yog ib qho amide, whereas DMSO yog ib qho organosulfur compound.
