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金催化丙炔胺制联烯反应机理的理论研究
发表时间:2018-01-15 浏览量:1893 下载量:266
全部作者: | 陈秀梅,孙青,吕鑫 |
作者单位: | 厦门大学化学化工学院 |
摘 要: | 运用密度泛函理论(density functional theory,DFT)在B3LYP/6-31+G(d)&SDD计算水平上对AuCl3催化丙炔胺制联烯的反应机理进行研究。考察两种具有不同胺基的丙炔胺底物,发现此过程需经过底物活化/[1,5]氢迁移/b-消去/底物交换一系列基元步骤,其中b-消去是决速步,且整个过程为放热反应。研究从理论上揭示了AuCl3确实可以催化丙炔胺制联烯。 |
关 键 词: | 物理化学;AuCl3;密度泛函理论;联烯 |
Title: | Theoretical investigation on the mechanism of gold-catalyzed synthesis of allene from propargylamine |
Author: | CHEN Xiumei, SUN Qing, LÜ Xin |
Organization: | College of Chemistry and Chemical Engineering, Xiamen University |
Abstract: | The mechanism of AuCl3-catalyzed synthesis of allene from propargylamine is investigated by means of density functional theory (DFT) calculations at the B3LYP/6-31+G(d)&SDD level of theory. Two kinds of propargylamine with different amino groups have been concerned. The computations disclose that the whole process occurs in the following steps: substrate activation upon ligating to AuCl3, [1,5]hydrogen migration with formation of a zwitterionic intermediat, β-elimination of imine and transmetallation from the as-formed AuCl3-allene complex to propargylamine. The rate-determining step is β-elimination. The whole process is exothermic. This work theoretically shows that Lewis acid AuCl3 is capable of catalyzing the transformation of propargylamine into allene. |
Key words: | physical chemistry; AuCl3; density functional theory; allene |
发表期数: | 2018年1月第1期 |
引用格式: | 陈秀梅,孙青,吕鑫. 金催化丙炔胺制联烯反应机理的理论研究[J]. 中国科技论文在线精品论文,2018,11(1):58-61. |

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