I-Dimethyl carbonate CAS: 616-38-6
Dimethyl carbonate (DMC), i-raw material eneekhemikhali ezinobuthi obuphantsi, ukusebenza kakuhle kokusingqongileyo kunye nokusetyenziswa okubanzi, yinto ebalulekileyo ephakathi kwi-organic synthesis.Isakhiwo sayo se-molecular iqukethe amaqela asebenzayo afana ne-carbonyl, i-methyl kunye ne-methoxy, kwaye ine-reactivity eyahlukeneyo.Ineempawu zokusetyenziswa ngokukhuselekileyo, ukulungeleka, ukungcoliseka okuncinci kunye nokuhamba ngokulula kwimveliso.I-Dimethyl carbonate yimveliso yeekhemikhali "eluhlaza" ethembisayo ngenxa yobuthi bayo obuphantsi.
Ifomula yemolekyuli: C3H6O3;(CH3O)2CO ;I-CH3O-COOCH3
Ubunzima bemolekyuli: 90.07
Inombolo yeCASS: 616-38-6
Inombolo ye-EINECS: 210-478-4
Ukusetyenziswa kwendalo Iipropati ezigqwesileyo kunye nesakhiwo esikhethekileyo semolekyuli ye-DMC simisela ukusetyenziswa kwayo okubanzi, okunokuthi kushwankathelwe ngolu hlobo lulandelayo:
Faka endaweni ye-phosgene esongwayo njenge-arhente ye-carbonylation.
Nangona i-phosgene (i-Cl-CO-Cl) ine-reactivity ephezulu, iimveliso zayo ezinetyhefu kakhulu kunye nezonakalisayo ziyenza ijongane noxinzelelo olukhulu lokusingqongileyo, ngoko iya kupheliswa ngokuthe ngcembe.I-DMC (CH3O-CO-OCH3) ineziko elifanayo le-nucleophilic reaction.Xa iqela le-carbonyl le-DMC lihlaselwa yi-nucleophiles, i-acyl-oxygen bond breaks to form carbonyl compounds, kunye nemveliso ye-methanol.Ngoko ke, i-DMC ingathatha indawo ye-phosgene njenge-reagent yokusabela ekhuselekileyo yokwenza i-carbonic acid derivatives, efana ne-carbamate pesticides, i-polycarbonates, i-isocyanates, njl., apho i-polycarbonate iya kuba yintsimi enemfuno enkulu ye-DMC.Kuqikelelwa ukuba ngo-2005.
Faka esikhundleni se-dimethyl sulfate esongiweyo njenge-agent ye-methylating.
Ngenxa yezizathu ezifana ne-phosgene, i-dimethyl sulfate (CH3O-SO-OCH3) nayo ijongene noxinzelelo lokuphelisa.Xa i-methyl carbon ye-DMC ihlaselwa yi-nucleophiles, i-alkyl-oxygen bond yayo iphukile kwaye iimveliso ze-methylated nazo zenziwe.Ngaphezu koko, isivuno sokuphendula se-DMC siphezulu kwaye inkqubo ilula kune-dimethyl sulfate.Olona setyenziso luphambili lubandakanya ukudibanisa i-organic intermediates, iimveliso zamayeza, iimveliso ze-pesticide, njl.
