Dimethyl carbonate CAS:616-38-6
Dimethyl carbonate (DMC), he mea kemika me ka haʻahaʻa haʻahaʻa, ka maikaʻi o ka mālama ʻana i ke kaiapuni a me ka noi ākea, he mea koʻikoʻi ia no ka synthesis organik.Loaʻa i kāna ʻano molekala nā pūʻulu hana e like me carbonyl, methyl a me methoxy, a he ʻano hana like ʻole kona.Loaʻa iā ia nā hiʻohiʻona o ka hoʻohana palekana, ka maʻalahi, ka liʻiliʻi o ka pollution a me ka maʻalahi o ka lawe ʻana i ka hana.ʻO ka Dimethyl carbonate kahi huahana kemika "'ōmaʻomaʻo" no ka haʻahaʻa o kona ʻona.
Huina molekala: C3H6O3;(CH3O)2CO ;CH3O-COOCH3
Kaumaha Molekala: 90.07
No CASN: 616-38-6
Helu EINECS: 210-478-4
Hoʻohana Nature ʻO nā waiwai maikaʻi loa a me ka hoʻolālā molecular kūikawā o DMC e hoʻoholo i kāna noi ākea, hiki ke hōʻuluʻulu ʻia penei:
E hoʻololi i ka phosgene i pelu ʻia ma ke ʻano he mea hana carbonylation.
ʻOiai ʻo ka phosgene (Cl-CO-Cl) he kiʻekiʻe ka reactivity, ʻo kāna mau mea ʻawaʻawa a me ka corrosive by-products e hoʻohālikelike ai i ke koʻikoʻi o ke kaiapuni, no laila e hoʻopau mālie ʻia.ʻO DMC(CH3O-CO-OCH3) kahi kikowaena nucleophilic like.Ke hoʻouka ʻia ka pūʻulu carbonyl o DMC e nā nucleophiles, ua haki ka paʻa acyl-oxygen e hana i nā pūhui carbonyl, a ʻo ka huahana ka methanol.No laila, hiki iā DMC ke hoʻololi i ka phosgene ma ke ʻano he reagent hopena palekana e synthesize i nā derivatives carbonic acid, e like me ka pesticides carbamate, polycarbonates, isocyanates, a me nā mea ʻē aʻe, ma waena o ka polycarbonate ka māla me ka koi nui loa no DMC.Ua wānana ʻia i ka makahiki 2005.
E hoʻololi i ka dimethyl sulfate i pelu ʻia ma ke ʻano he methylating agent.
No nā kumu like me ka phosgene, ke kū nei ka dimethyl sulfate (CH3O-SO-OCH3) i ke kaomi o ka hoʻopau ʻana.Ke hoʻouka ʻia ka methyl carbon o DMC e nā nucleophiles, ua haki ʻia kāna paʻa alkyl-oxygen a hana pū ʻia nā huahana methylated.Eia kekahi, ʻoi aku ka kiʻekiʻe o ka hopena o ka DMC a ʻoi aku ka maʻalahi o ke kaʻina hana ma mua o ka dimethyl sulfate.ʻO ka hoʻohana nui ʻana me ka synthesizing intermediates organik, nā huahana pharmaceutical, nā huahana pesticide, etc.
