N,N-Dimethylformamide CAS 68-12-2
Sumo yechigadzirwa
Dimethylformamide inonzi DMF. Imusanganiswa umo boka rehydroxyl reformic acid rinotsiviwa neboka redimethylamino, rine molecular formula HCON(CH3)2. Imvura isina ruvara uye yakajeka ine kunhuhwirira kweamine uye huwandu hwe0.9445 (25℃). Nzvimbo yekunyunguduka -61℃. Nzvimbo yekufashaira 152.8℃. Nzvimbo yekupenya 57.78℃. Kuwanda kwevapor 2.51. Kumanikidzwa kwevapor 0.49kpa (3.7mmHg25℃). Nzvimbo yekuzvipisa otomatiki i445℃. Muganho wekuputika kwemusanganiswa wemhepo nemhepo i2.2~15.2%. Kusangana nemoto wakavhurika uye kupisa kwakanyanya kunogona kukonzera kutsva nekuputika. Inogona kuita zvine simba nesulfuric acid yakakora uye nitric acid inoputika uye inotoputika. Inosanganiswa nemvura uye organic solvents dzakawanda. Chemicalbook. Isolvent yakajairika yemakemikari reactions. Dimethylformamide yakachena haina hwema, asi dimethylformamide yemhando yeindasitiri kana kuti yakaora ine hwema hwehove nekuti ine tsvina yedimethylamine. Zita iri rinobva pakuti inotsiva dimethyl yeformamide (amide yeformic acid), uye mapoka ese ari maviri emethyl ari paatomu yeN (nitrogen). Dimethylformamide isolvent yepolar (hydrophilic) aprotic ine polar (hydrophilic) aprotic ine poiling point yakawanda, iyo inogona kukurudzira SN2 reaction mechanism. Dimethylformamide inogadzirwa kubva kuformic acid nedimethylamine. Dimethylformamide haina kugadzikana (kunyanya pakupisa kwakanyanya) kana paine mabhesi akasimba akadai sesodium hydroxide kana maacid akasimba akadai sehydrochloric acid kana sulfuric acid, uye inochinja kuita formic acid nedimethylamine.
Inogadzikana zvikuru mumhepo uye kana yapiswa kusvika yafashaira. Kana tembiricha yakakwira kupfuura 350°C, inorasikirwa nemvura uye inogadzira carbon monoxide nedimethylamine. N,N-dimethylformamide chinhu chakanaka kwazvo che aprotic polar solvent chinogona kunyungudutsa zvinhu zvakawanda zve organic ne inorganic uye chinogona kusanganiswa nemvura, alcohols, ethers, aldehydes, ketones, esters, halogenated hydrocarbons uye aromatic hydrocarbons. . Mugumo weN,N-dimethylformamide molecule wakakomberedzwa ne methyl groups, zvichiita spatial Chemicalbook barrier inodzivirira ma negative ions kuti asasvike uye inongobatanidza ma positive ions chete. Ma bare anions anoshanda zvakanyanya kupfuura ma solvated anions. Mazhinji ma ionic reactions ari nyore kuita muN,N-dimethylformamide pane mune general protic solvents. Semuenzaniso, ma carboxylates nema halogenated hydrocarbons anoita muN,N-dimethylformamide patembiricha yemumba. , anogona kugadzira ma esters ane goho rakakura, uye anonyanya kukodzera kugadzirwa kwema sterically hindrated esters.
Munda wekushandisa
Dimethylformamide imvura isina ruvara uye inoonekera. Haisi chete chinhu chinoshandiswa zvakanyanya mumakemikoro, asiwo chinhu chinonyungudutsa chakanaka chine mashandisirwo akasiyana-siyana. Dimethylformamide chinhu chakakosha mumaindasitiri emishonga, petrochemical, dehwe nemamwe.
Tsananguro yekuvaka
N,N-Dimethylformamide
CAS 68-12-2
Nhamba yeCB: CB2854115
Fomura yemasero: C3H7NO
Kurema kwemamorekuru 73.09
Nzvimbo yekunyunguduka: -61°C (yakapfava)
Kutenderera kwakananga: 0.94º
Pokufashaira: 153°C (yakapfava)
Kuwanda: 0.944g/mL (yakapfava) V
apor Chemicalbook Kuwanda kwemhepo: 2.5 (vsair)
Kumanikidzwa kwemhepo: 2.7mmHg (20°C) Refractive index: n20/D1.430(lit.)
Pokupenya kwechiedza: 136°
Kuchengeta nekutakura
Kurongedza: zvinoenderana nezvinodiwa nevatengi
Kuchengetera: Chengeta munzvimbo yakaoma, ine rima uye ine mhepo inofefetera.
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