N,N-Dimethylformamide CAS 68-12-2
Product sumo
Dimethylformamide inonzi DMF. Ikomboni iyo iyo hydroxyl boka re formic acid inotsiviwa neboka re dimethylamino, ine molecular formula HCON (CH3)2. Iyo isina ruvara uye inoonekera yakakwirira-inofashaira poindi mvura ine yakareruka amine kunhuhwirira uye hukama density ye0.9445 (25 ℃). Kunyungudika -61 ℃. Kubikira poindi 152.8 ℃. Flash point 57.78 ℃. Vapor density 2.51. Mhepo inotsikirira 0.49kpa (3.7mmHg25 ℃). Autoignition poindi ndeye 445 ℃. Muganho wekuputika wehutsi nemhepo musanganiswa ndeye 2.2 ~ 15.2%. Kusangana nemoto wakavhurika uye kupisa kwakanyanya kunogona kukonzera kupisa uye kuputika. Inogona kuita zvechisimba ine concentrated sulfuric acid uye fuming nitric acid uye kunyange kuputika. Inosanganiswa nemvura uye yakawanda organic solvents Chemicalbook. Icho chinhu chinowanzogadziriswa chemakemikari maitiro. Dimethylformamide yakachena haina kunhuwa, asi giredhi remaindasitiri kana rakadzikira dimethylformamide ine hwema hwehove nekuti ine dimethylamine tsvina. Iro zita rinobva pakuti idimethyl inotsiva formamide (amide yefomic acid), uye mapoka ese emethyl anowanikwa paN (nitrogen) atomu. Dimethylformamide inonzi polar (hydrophilic) aprotic solvent ine nzvimbo yakakwirira yekuvira, iyo inogona kukurudzira SN2 reaction mechanism. Dimethylformamide inogadzirwa kubva kune formic acid uye dimethylamine. Dimethylformamide haina kugadzikana (kunyanya pakupisa kwepamusoro) muhupo hwezvigadziko zvakasimba zvakadai se sodium hydroxide kana yakasimba acids yakadai sehydrochloric acid kana sulfuric acid, uye hydrolyzes kune formic acid uye dimethylamine.
Yakanyatsogadzikana mumhepo uye kana ichipisa kusvika pakuvira. Kana tembiricha yakwira kudarika 350°C, inorasa mvura uye inogadzira carbon monoxide ne dimethylamine. N,N-dimethylformamide yakanaka kwazvo aprotic polar solvent inogona kunyungudutsa yakawanda organic uye inorganic substances uye inosanganiswa nemvura, alcohols, ethers, aldehydes, ketones, esters, halogenated hydrocarbons uye anonhuwirira hydrocarbons. . Magumo akanaka ekupedzisira eN, N-dimethylformamide molecule yakakomberedzwa nemapoka emethyl, achigadzira nzvimbo yeChemicalbook barrier iyo inodzivirira ion yakaipa kuti isaswedere uye inongobatanidza ion yakanaka. Bare anions inonyanya kushanda kupfuura anions yakagadziriswa. Maitikiro akawanda eionic ari nyore kuita muN,N-dimethylformamide pane zvakajairika protic solvents. Semuyenzaniso, macarboxylates uye halogenated hydrocarbons anoita muN,N-dimethylformamide pakudziya kwekamuri. , inogona kuburitsa esters negoho rakawanda, uye inonyanya kukodzera kubatanidzwa kwesterically kuvharirwa esters.
Nzvimbo yekushandisa
Dimethylformamide imvura isina ruvara uye yakajeka. Haisi chete makemikari anoshandiswa zvakanyanya, asiwo yakanakisa solvent ine huwandu hwakawanda hwekushandisa. Dimethylformamide chinhu chakakosha mbishi mumishonga, petrochemical, matehwe uye mamwe maindasitiri.
Tsanangudzo yekuvaka
N, N-Dimethylformamide
CAS 68-12-2
CBNhamba: CB2854115
Molecular formula: C3H7NO
Molecular uremu 73.09
Kunyungudika: -61°C (lit.)
Kutenderera chaiko: 0.94º
Kuvira kwemvura: 153°C (lit.)
Density: 0.944g/mL (lit.) V
apo Chemicalbook Vapor density: 2.5 (vsair)
Mhepo yehutsi: 2.7mmHg (20°C) Refractive index: n20/D1.430(lit.)
Flash point: 136°
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