The tautomerization of H2NCH2C(OH)NH to H2NCH2CONH2 in the interstellar medium
文献类型：期刊论文
| 作者 | Xu SiChuan1,2; Deng ShengRong1; Ma LiYing1; Shi Qiang1; Zhang XingKang1; Ge MaoFa1 |
| 刊名 | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
 |
| 出版日期 | 2011 |
| 卷号 | 54期号:1页码:156-163 |
| 关键词 | H2nch2c(Oh)Nh H2nch2conh2 Interstellar Medium Amino Acid Origin Hydrogen Tunneling |
| ISSN号 | 1674-7348 |
| DOI | 10.1007/s11433-010-4115-x |
| 英文摘要 | The tautomerization of H2NCH2C(OH)NH to H2NCH2CONH2 is an important step by way of Strecker synthesis for the production of glycine in the interstellar medium (ISM) with respect to the origin of amino acids on the early Earth. Our work indicates two mechanisms for the tautomerization to occur. k(CVT/SCT) (rate constant) is 45.6 s(-1) at 50 K, obtained with the small curvature tunneling (SCT) approximation and canonical variational transition state theory (CVT), to support one mechanism assisted by quantum tunneling in the ISM. Another mechanism is through the (H2O)(2)-coupled proton transfer. In the (H2O)(2)-coupled reaction, two H2O molecules act as a catalyst to reduce the barrier energy by 23.7 kcal mol(-1), and cooperatively let a proton pass a hydrogen-bonded bridge composed of H2NCH2C(OH)NH with (H2O)(2). k(TST) is 8.08x10(-4) s(-1) at 100 K, calculated with TST kinetics, to demonstrate the mechanism. Therefore, the tautomerization is feasible in the ISM. H2NCH2C(OH)NH and H2NCH2CONH2 will be detected in the ISM and found in carbonaceous chondrites. The results present new evidence for the third theory on the origin of amino acids on the early Earth. |
| 语种 | 英语 |
| WOS记录号 | WOS:000287765900024 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/73511]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Xu SiChuan |
| 作者单位 | 1.Yunnan Univ, Lab Origin Life, Coll Chem Sci & Technol, Key Lab Minist Educ Med Chem Nat Resource, Kunming 650091, Peoples R China 2.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu SiChuan,Deng ShengRong,Ma LiYing,et al. The tautomerization of H2NCH2C(OH)NH to H2NCH2CONH2 in the interstellar medium[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2011,54(1):156-163. |
| APA | Xu SiChuan,Deng ShengRong,Ma LiYing,Shi Qiang,Zhang XingKang,&Ge MaoFa.(2011).The tautomerization of H2NCH2C(OH)NH to H2NCH2CONH2 in the interstellar medium.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,54(1),156-163. |
| MLA | Xu SiChuan,et al."The tautomerization of H2NCH2C(OH)NH to H2NCH2CONH2 in the interstellar medium".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 54.1(2011):156-163. |
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来源：化学研究所
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