N,N-Dimethylformamide CAS 68-12-2
Selelekela sa sehlahisoa
Dimethylformamide e bitsoa DMF. Ke motsoako oo sehlopha sa hydroxyl sa formic acid se nkeloang sebaka ke sehlopha sa dimethylamino, ka foromo ea molek'hule ea HCON(CH3)2. Ke mokelikeli o nang le ntlha e belang e se nang 'mala le e bonaletsang e nang le monko o bobebe oa amine le boima bo lekanyelitsoeng ba 0.9445 (25℃). Ntlha ea ho qhibiliha -61℃. Ntlha ea ho belisa 152.8℃. Ntlha ea Flash 57.78℃. Boima ba mouoane 2.51. Khatello ea mouoane 0.49kpa (3.7mmHg25℃). Ntlha ea ho iketsa mollo ke 445℃. Moeli oa ho phatloha ha mouoane le moea ke 2.2~15.2%. Ho pepesehela malakabe a bulehileng le mocheso o phahameng ho ka baka ho tuka le ho phatloha. E ka arabela ka matla ka sulfuric acid e matla le nitric acid e tukang 'me ea phatloha. E kopantsoe le metsi le boholo ba li-solvents tsa organic Chemicalbook. Ke solvent e tloaelehileng bakeng sa lik'hemik'hale. Dimethylformamide e hloekileng ha e na monko o monate, empa dimethylformamide ea maemo a indasteri kapa e senyehileng e na le monko o kang oa tlhapi hobane e na le litšila tsa dimethylamine. Lebitso lena le tsoa 'neteng ea hore ke sebaka sa dimethyl sa formamide (amide ea formic acid),' me lihlopha ka bobeli tsa methyl li fumaneha holim'a athomo ea N (naetrojene). Dimethylformamide ke tharollo ea polar (hydrophilic) aprotic e nang le ntlha e phahameng ea ho belisa, e ka khothalletsang mokhoa oa karabelo ea SN2. Dimethylformamide e entsoe ka formic acid le dimethylamine. Dimethylformamide ha e tsitse (haholo-holo mochesong o phahameng) moo ho nang le metheo e matla joalo ka sodium hydroxide kapa li-acid tse matla joalo ka hydrochloric acid kapa sulfuric acid, 'me e fetoha formic acid le dimethylamine.
E tsitsitse haholo moeeng le ha e futhumatsoa ho fihlela e bela. Ha mocheso o phahame ho feta 350°C, e lahleheloa ke metsi mme e hlahisa carbon monoxide le dimethylamine. N,N-dimethylformamide ke tharollo e ntle haholo ea aprotic polar e ka qhalang lintho tse ngata tsa tlhaho le tse sa tloaelehang 'me e kopanngoa le metsi, alcohols, ethers, aldehydes, ketones, esters, halogenated hydrocarbons le aromatic hydrocarbons. . Qetello e nang le positive charged ea molek'hule ea N,N-dimethylformamide e pota-potiloe ke lihlopha tsa methyl, e etsang mokoallo oa sebaka oa Chemicalbook o thibelang li-ion tse mpe ho atamela 'me o amahanya li-ion tse ntle feela. Li-anion tse se nang letho li sebetsa haholo ho feta li-anion tse rarollotsoeng. Likarabelo tse ngata tsa ionic li bonolo ho li etsa ho N,N-dimethylformamide ho feta ho li-solvents tse akaretsang tsa protic. Mohlala, li-carboxylate le li-hydrocarbons tsa halogenated li arabela ho N,N-dimethylformamide mochesong oa kamore. , li ka hlahisa li-ester tse nang le chai e ngata, 'me li loketse haholo ho etsoa ha li-ester tse sitisoang ke sterically.
Tšimo ea kopo
Dimethylformamide ke mokelikeli o se nang 'mala le o bonaletsang. Hase feela thepa e tala ea lik'hemik'hale e sebelisoang haholo, empa hape ke tharollo e ntle haholo e nang le mefuta e mengata ea ts'ebeliso. Dimethylformamide ke thepa ea bohlokoa indastering ea meriana, petrochemical, letlalo le liindasteri tse ling.
Tlhaloso ea kaho
N,N-Dimethylformamide
CAS 68-12-2
Nomoro ea CB: CB2854115
Foromo ea limolek'hule: C3H7NO
Boima ba limolek'hule 73.09
Sebaka sa ho qhibiliha: -61°C (ho bonesitsoe)
Potoloho e itseng: 0.94º
Boemo ba ho belisa: 153°C (ho bonesa)
Botenya: 0.944g/mL (e bobebe) V
Bongata ba mouoane: 2.5 (vsair)
Khatello ea mouoane: 2.7mmHg (20°C) Tekanyo ea refractive: n20/D1.430(lit.)
Sebaka sa ho bonesa: 136°
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