Dimethyl carbonate CAS: 616-38-6
Dimethyl carbonate (DMC), walxo kiimiko ah oo ceeriin ah oo leh sunta hoose, waxqabadka ilaalinta deegaanka ee heer sare ah iyo codsi ballaaran, waa dhexdhexaad muhiim u ah isku-dhafka dabiiciga ah.Qaab dhismeedkeeda kelli waxa uu ka kooban yahay kooxo shaqaynaya sida karbonyl, methyl iyo methoxy, waxayna leedahay falcelin kala duwan.Waxay leedahay sifooyinka isticmaalka badbaadada leh, ku habboonaanta, wasakhowga yar iyo gaadiidka fudud ee wax soo saarka.Dimethyl carbonate waa badeeco kiimiko ah oo "cagaaran" ah oo rajo leh sababtoo ah suntiisa hoose.
Nafaqada molecular: C3H6O3;(CH3O)2CO;CH3O-COOCH3
Miisaanka molecular: 90.07
CASno.: 616-38-6
EINECS nambarka: 210-478-4
Isticmaalka Dabeecadda Guryaha ugu wanaagsan iyo qaab-dhismeedka molecular ee gaarka ah ee DMC ayaa go'aamiya codsigeeda ballaaran, kaas oo lagu soo koobi karo sida soo socota:
Ku beddel fosgene-ka laalaaba sida wakiilka kaarboonyaynta.
Inkasta oo phosgene (Cl-CO-Cl) ay leedahay fal-celin sare, alaabteeda sunta ah ee aadka u sunta ah iyo daxalka ayaa ka dhigaya inay la kulmaan cadaadis weyn oo deegaanka ah, sidaas darteed si tartiib tartiib ah ayaa loo tirtiri doonaa.DMC(CH3O-CO-OCH3) waxay leedahay xarun falcelin nucleophilic ah oo la mid ah.Marka kooxda kaarboonyl ee DMC ay soo weerarto nucleophiles, curaarta acyl-oxygen ayaa jebisa si ay u sameeyaan xeryahooda carbonyl, ka-soo-saarku waa methanol.Sidaa darteed, DMC waxay u beddeli kartaa fosgene sida falcelinta badbaadada leh si ay u soo saarto walxaha kaarbooniga ah, sida sunta cayayaanka carbamate, polycarbonates, isocyanates, iwm.Waxaa la saadaaliyay in 2005.
U beddel dimethyl sulfate oo laablaaban sidii wakiilka methylating.
Sababaha la midka ah fosgene-ka, dimethyl sulfate (CH3O-SO-OCH3) ayaa sidoo kale wajahaysa cadaadiska ciribtirka.Marka kaarboonka methyl ee DMC ay soo weeraraan nucleophiles, xidhidhaheeda alkyl-oxygen waa la jabaa waxaana sidoo kale la soo saaraa alaabada methylated.Waxaa intaa dheer, wax-soo-saarka falcelinta ee DMC waa uu sarreeyaa, geeddi-socodkana wuu ka fudud yahay kan dimethyl sulfate.Isticmaalka ugu muhiimsan waxaa ka mid ah isku-darka dhexdhexaadiyeyaasha organic, alaabta dawooyinka, alaabta sunta cayayaanka, iwm.
