|
|Section8= }} Ammonium carbamate is a salt of ammonia and carbamic acid. This compound is a white solid that is extremely soluble in water, soluble in alcohol, and only slightly volatile at room temperature. It is prepared by the direct reaction between liquid ammonia and dry ice (solid carbon dioxide): :2 NH3(l) + CO2(s) → H2NCOONH4 ==Reactions== Ammonium carbamate undergoes hydration reversibly: :NH2CO2NH4 + H2O → (NH4)2CO3 It may also revert to carbon dioxide and ammonia as follows:〔 :NH2CO2NH4 → 2NH3 + CO2 Ammonium carbamate can play a key role in the formation of carbamoyl phosphate, which is necessary for both the urea cycle and the production of pyrimidines. In this enzyme-catalyzed reaction, ATP and ammonium carbamate are converted to ADP and carbamoyl phosphate. The reaction is as follows:〔Goldberg, R. N. Apparent Equilibrium Constants for Enzyme-catalyzed reactions (2009). ''CRC Handbook of Chemistry and Physics,'' 7–19. Retrieved from http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900943〕〔(Phosphorus Compounds: Advances in Research and Application: 2011 Edition )〕 :ATP + NH2CO2NH4 → ADP + H2NC(O)OPO32− 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ammonium carbamate」の詳細全文を読む スポンサード リンク
|