N,N-Dimethylformamide CAS 68-12-2
Folasaga o oloa
Dimethylformamide ua taʻua o le DMF. O se tuufaatasiga lea e suia ai le vaega hydroxyl o le formic acid i se vaega dimethylamino, faatasi ai ma le fua mole mole HCON(CH3)2. O se vai e leai se lanu ma manino maualuga-puna vai ma se manogi amine mama ma se density vavalalata o le 0.9445 (25 ℃). Liu liusuavai -61℃. Fa'asao 152.8℃. Fa'amumū 57.78℃. Ausa malosi 2.51. Ausa mamafa 0.49kpa (3.7mmHg25 ℃). E 445C. O le faʻalavelave faʻalavelave o le ausa ma le faʻafefiloi o le ea e 2.2 ~ 15.2%. O le fa'aalia i le afi matala ma le vevela maualuga e ono mafua ai le mu ma pa. E mafai ona fa'aoso fa'amalosi i le sulfuric acid concentrated ma fuming nitric acid ma e o'o lava ina pa. E fa'afefiloi i le vai ma le tele o vaila'au fa'aletino. O se vaifofo masani mo gaioiga fa'ama'i. O le dimethylformamide mama e leai se manogi, ae o tulaga fale gaosi oloa po'o le leaga o le dimethylformamide e manogi i'a aua o lo'o i ai mea leaga ole dimethylamine. O le igoa e sau mai le mea moni e faapea o se dimethyl suitulaga o formamide (amide of formic acid), ma o vaega uma o le methyl o loʻo i luga o le N (nitrogen) atom. O le Dimethylformamide o se polar (hydrophilic) aprotic solvent ma se maualuga maualuga, lea e mafai ona faʻalauiloaina le SN2 reaction mechanism. Dimethylformamide e faia mai le formic acid ma le dimethylamine. Dimethylformamide e le mautu (aemaise lava i le maualuga o le vevela) pe a iai ni faʻavae malosi e pei o le sodium hydroxide poʻo mea malosi e pei ole hydrochloric acid poʻo le sulfuric acid, ma faʻafefeteina ile formic acid ma le dimethylamine.
E matua mautu i le ea ma pe a faʻavevela seia faʻafefe. A maualuga le vevela nai lo le 350°C, e leiloa le vai ma maua ai le carbon monoxide ma le dimethylamine. O le N,N-dimethylformamide o se mea e sili ona lelei aprotic polar solvent e mafai ona faʻamavaeina le tele o mea faʻapitoa ma mea faʻapitoa ma e faʻafefiloi ma vai, ava malosi, ethers, aldehydes, ketones, esters, halogenated hydrocarbons ma aromatic hydrocarbons. . O le fa'ai'uga lelei o le N,N-dimethylformamide mole o lo'o si'osi'omia e vaega methyl, e fai ai se pa puipui fa'apitonu'u e taofia ai ion leaga mai le fa'alatalata mai ma na'o fa'afeso'ota'i iona lelei. E sili atu le malosi o anion fa'atosina nai lo anion fa'amavae. O le tele o gaioiga fa'aona e faigofie ona fa'atinoina i le N,N-dimethylformamide nai lo so'o fa'apolokalame lautele. Mo se fa'ata'ita'iga, ga'o carboxylates ma halogenated hydrocarbons i le N,N-dimethylformamide ile vevela potu. , e mafai ona gaosia esters ma fua maualuga, ma e sili ona talafeagai mo le tuufaatasia o esters sterically taofia.
Talosaga fanua
Dimethylformamide o se vai e leai ni lanu ma manino. E le gata o se vailaʻau faʻaaogaina lautele, ae o se solvent sili ona lelei ma le tele o faʻaoga. O le Dimethylformamide o se mea taua tele i vailaʻau, petrochemical, paʻu ma isi pisinisi.
Fa'amatalaga faufale
N,N-Dimethylformamide
CAS 68-12-2
Numera CBN: CB2854115
Fuafua mole: C3H7NO
Mole mole mamafa 73.09
Liu liusuavai: -61°C (malamalama)
Ta'amilosaga fa'apitoa: 0.94º
Fa'apuna: 153°C (malamalama)
Malosi: 0.944g/mL (malamalama) V
apor Chemicalbook Malosi o ausa: 2.5 (vsair)
Ausa malosi: 2.7mmHg (20°C) Fa'asinomaga fa'asao: n20/D1.430(malamalama)
Itu ole moli: 136°
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