Dimethyl carbonate CAS: 616-38-6
Dimethyl carbonate (DMC), thepa e tala ea lik'hemik'hale e nang le chefo e tlase, ts'ebetso e ntle ea ts'ireletso ea tikoloho le ts'ebeliso e pharaletseng, ke karolo ea bohlokoa ea ho kopanya lintho tsa tlhaho.Sebopeho sa eona sa limolek'hule se na le lihlopha tse sebetsang tse kang carbonyl, methyl le methoxy, 'me e na le ts'ebetso e sa tšoaneng.E na le litšobotsi tsa tšebeliso e sireletsehileng, bonolo, tšilafalo e fokolang le lipalangoang tse bonolo tlhahisong.Dimethyl carbonate ke sehlahisoa sa lik'hemik'hale se "tala" se tšepisang ka lebaka la chefo ea eona e tlaase.
Mokhoa oa molek'hule: C3H6O3;(CH3O)2CO ;CH3O-COOCH3
Boima ba molek'hule: 90.07
CASNo.: 616-38-6
Nomoro ea EINECS: 210-478-4
Tšebeliso ea tlhaho Thepa e ntle haholo le sebopeho se ikhethileng sa limolek'hule tsa DMC li tsebahatsa ts'ebeliso ea eona e pharalletseng, e ka akaretsoang ka tsela e latelang:
Kenya sebaka sa phosgene e mennweng e le sesebediswa sa carbonylation.
Le hoja phosgene (Cl-CO-Cl) e na le reactivity e phahameng, lihlahisoa tsa eona tse chefo haholo le tse senyang li etsa hore e tobane le khatello e kholo ea tikoloho, kahoo e tla felisoa butle-butle.DMC(CH3O-CO-OCH3) e na le setsi se ts'oanang sa nucleophilic reaction.Ha sehlopha sa carbonyl sa DMC se hlaseloa ke li-nucleophiles, bond ea acyl-oksijene e robeha ho etsa metsoako ea carbonyl, 'me sehlahisoa ke methanol.Ka hona, DMC e ka nka sebaka sa phosgene e le reagent e sireletsehileng ea ho etsa lintho tse tsoang ho carbonic acid, joalo ka chefo e bolaeang likokonyana ea carbamate, polycarbonates, isocyanates, joalo-joalo, moo polycarbonate e tla ba tšimo e nang le tlhoko e kholo ka ho fetisisa ea DMC.Ho boleloa esale pele hore ka 2005.
Kenya sebaka sa dimethyl sulfate e mennweng e le methylating agent.
Ka mabaka a tšoanang le phosgene, dimethyl sulfate (CH3O-SO-OCH3) e boetse e tobane le khatello ea ho felisa.Ha methyl carbon ea DMC e hlaseloa ke li-nucleophiles, tlamo ea eona ea alkyl-oksijene e robehile 'me lihlahisoa tsa methylated le tsona lia hlahisoa.Ho feta moo, tlhahiso ea karabelo ea DMC e phahame mme ts'ebetso e bonolo ho feta ea dimethyl sulfate.Ts'ebeliso ea mantlha e kenyelletsa ho kopanya li-organic intermediates, lihlahisoa tsa meriana, lihlahisoa tsa chefo e bolaeang likokoanyana, jj.
