N,N-Dimethylformamide CAS 68-12-2
Chiyambi cha malonda
Dimethylformamide imatchedwa DMF. Ndi mankhwala omwe gulu la hydroxyl la formic acid limalowetsedwa m'malo ndi gulu la dimethylamino, lomwe lili ndi molecular formula HCON(CH3)2. Ndi madzi otentha kwambiri opanda mtundu komanso owonekera bwino okhala ndi fungo lopepuka la amine komanso kuchuluka kwa 0.9445 (25℃). Malo osungunuka -61℃. Malo owira 152.8℃. Malo owunikira 57.78℃. Kuchuluka kwa nthunzi 2.51. Kuthamanga kwa nthunzi 0.49kpa (3.7mmHg25℃). Malo oyatsira moto ndi 445℃. Malire a kuphulika kwa nthunzi ndi mpweya ndi 2.2~15.2%. Kukhudzana ndi malawi otseguka ndi kutentha kwambiri kungayambitse kuyaka ndi kuphulika. Imatha kuchitapo kanthu mwamphamvu ndi sulfuric acid yolimba komanso nitric acid yofukiza komanso kuphulika. Imasakanikirana ndi madzi ndi zinthu zambiri zachilengedwe. Chemicalbook. Ndi chinthu chodziwika bwino chosungunulira zinthu zamagetsi. Dimethylformamide yoyera ilibe fungo, koma dimethylformamide yotsika mtengo kapena yotsika mtengo ili ndi fungo la nsomba chifukwa ili ndi zinthu zodetsa za dimethylamine. Dzinali limachokera ku mfundo yakuti ndi dimethyl m'malo mwa formamide (amide wa formic acid), ndipo magulu onse awiri a methyl ali pa atomu ya N (nayitrogeni). Dimethylformamide ndi chosungunulira cha polar (hydrophilic) aprotic chokhala ndi kutentha kwakukulu, chomwe chingathandize kuti SN2 reaction ichitike. Dimethylformamide imapangidwa kuchokera ku formic acid ndi dimethylamine. Dimethylformamide ndi yosakhazikika (makamaka kutentha kwambiri) pamaso pa maziko olimba monga sodium hydroxide kapena ma acid amphamvu monga hydrochloric acid kapena sulfuric acid, ndipo imasungunuka kukhala formic acid ndi dimethylamine.
Ndi yokhazikika kwambiri mumlengalenga komanso ikatenthedwa mpaka kuwira. Kutentha kukapitirira 350°C, imataya madzi ndikupanga carbon monoxide ndi dimethylamine. N,N-dimethylformamide ndi solute yabwino kwambiri ya aprotic polar yomwe imatha kusungunula zinthu zambiri zachilengedwe ndi zosapangidwa ndipo imasakanikirana ndi madzi, ma alcohols, ethers, aldehydes, ketones, esters, halogenated hydrocarbons ndi aromatic hydrocarbons. . Mapeto a molekyulu ya N,N-dimethylformamide omwe ali ndi mphamvu yabwino amazunguliridwa ndi magulu a methyl, kupanga chotchinga cha spatial Chemicalbook chomwe chimaletsa ma negative ions kuti asayandikire ndipo chimangogwirizanitsa ma positive ions. Ma bare anions amagwira ntchito kwambiri kuposa ma solvated anions. Ma ionic reactions ambiri ndi osavuta kuchita mu N,N-dimethylformamide kuposa ma protic solvents ambiri. Mwachitsanzo, ma carboxylates ndi ma halogenated hydrocarbons amachita mu N,N-dimethylformamide kutentha kwa chipinda. , amatha kupanga ma esters okhala ndi zokolola zambiri, ndipo ndi oyenera kwambiri popanga ma esters omwe ali ndi vuto la sterically.
Munda wofunsira
Dimethylformamide ndi madzi opanda mtundu komanso owonekera bwino. Sikuti ndi mankhwala opangidwa ndi mankhwala okha, komanso ndi mankhwala abwino kwambiri okhala ndi ntchito zosiyanasiyana. Dimethylformamide ndi mankhwala ofunikira kwambiri m'mafakitale opanga mankhwala, petrochemical, chikopa ndi mafakitale ena.
Kufotokozera za zomangamanga
N,N-Dimethylformamide
CAS 68-12-2
Nambala ya CB: CB2854115
Fomula ya maselo: C3H7NO
Kulemera kwa maselo 73.09
Malo osungunuka: -61°C (lit.)
Kuzungulira kwapadera: 0.94º
Malo otentha: 153°C (lit.)
Kuchuluka: 0.944g/mL (lit.) V
Kuchuluka kwa nthunzi: 2.5 (vsair)
Kuthamanga kwa nthunzi: 2.7mmHg (20°C) Chizindikiro cha refractive: n20/D1.430(lit.)
Malo owunikira: 136°
Kusungira ndi mayendedwe
Kulongedza: malinga ndi zofunikira za makasitomala
Kusunga: Sungani pamalo ouma, amdima komanso opumira mpweya.
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