Dimethyl carbonate CAS:616-38-6
Dimethyl carbonate (DMC), he rauemi mata matū he iti te paitini, he pai te mahi tiaki taiao me te whakamahi whanui, he takawaenga nui mo te whakahiato waro.Kei roto i te hanganga ngota ngota he roopu mahi penei i te waro, te methyl me te methoxy, a he maha nga tauhohenga.Kei a ia nga ahuatanga o te whakamahi haumaru, te waatea, te iti o te parahanga me te ngawari o te kawe ki te whakaputa.He hua matū "matomato" te Dimethyl carbonate na te iti o te paitini.
tātai rāpoi: C3H6O3;(CH3O)2CO ;CH3O-COOCH3
Te taumaha ngota: 90.07
CASNNo.: 616-38-6
Nama EINECS: 210-478-4
Te whakamahi Nature Ko nga ahuatanga pai me te hanganga ngota motuhake o DMC e whakatau ana i tana whakamahinga whanui, ka taea te whakarapopoto penei:
Whakakapihia te phosgene kua takai hei kaihoko waro.
Ahakoa he nui te tauhohenga o te phosgene (Cl-CO-Cl), ko ona hua tino paitini me te pirau ka pa ki te pehanga taiao, no reira ka whakakorea haeretia.He rite tonu te pokapū tauhohenga nucleophilic DMC(CH3O-CO-OCH3).Ina whakaekea te roopu waro o DMC e nga nucleophiles, ka pakaru te here acyl-oxygen ki te hanga i nga pūhui waro, a ko te hua-a ko te methanol.Na reira, ka taea e te DMC te whakakapi i te phosgene hei tauhohenga haumaru hei whakahiato i nga hua o te waikawa waro, penei i te pesticides carbamate, polycarbonates, isocyanates, me etahi atu, kei roto ko te polycarbonate te mara me te hiahia nui mo te DMC.E matapaetia ana i te tau 2005.
Whakakapia te dimethyl sulfate kua takai hei kaihoko methylating.
Mo nga take e rite ana ki te phosgene, kei te anga ano te dimethyl sulfate (CH3O-SO-OCH3) ki te pehanga o te whakakore.Ka whakaekea te waro methyl o DMC e nga nucleophiles, ka pakaru tana here alkyl-oxygen ka puta ano nga hua methylated.I tua atu, he teitei ake te hua tauhohenga o te DMC me te ngawari ake o te mahi i tera o te dimethyl sulfate.Ko nga whakamahinga matua ko te whakahiato i nga takawaenga waro, hua rongoa, hua pesticide, etc.
