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有机化学
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有机化学 ›› 2003, Vol. 23 ›› Issue (9): 973-976. 上一篇    下一篇

研究论文

制备trans-Fe(CO)_3(PR_3)_2的新的取代过程

崔大军;彭立军;曾宪顺;徐风波;张正之   

  1. 南开大学
  • 发布日期:2003-09-25

New Substitution Process for Preparation of trans-Fe(CO)_3(PR_3)_2

Cui Dajun;Peng Lijun;Zeng Xianshun;Xu Fengbo;Zhang Zhengzhi   

  1. State Key Laboratory of Elemento-Organic Chemistry, Nankai University
  • Published:2003-09-25

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报道了用H_2Fe(CO)_4制备trans-Fe(CO)_3(PR_3)_2的新的羰基取代反应。在 过量质子存在下，H_2Fe(CO)_4中的羰基被活化，中心铁原子对膦的亲核进攻更为 敏感。在这种条件下H_2Fe(CO)_4与膦反应时，首先失去氢生成Fe(CO)_4(PR_3), Fe(CO)_4-(PR_3)再与第二个膦反应可高产率的得到trans-Fe(CO)_3(PR_3)_2。用 PPh_3与Fe(CO)_4(PPh_3)在过量质子存在下反应生成trans-Fe(CO)_3(PR_3)_2，证 实了上述过程。

关键词: 取代反应, 铁化合物, 羰基化合物, 亲核反应

In the presence of excess proton, the carbonyl on H_2Fe(CO)_4 is activated making the iron center more sensitive to the nucleophilic attack by phosphine. During the reaction of H_2Fe(CO)_4 with phosphine in given conditions, elimination of hydrogen first takes place to form Fe(CO)_4(PR_3), which then reacts with the second phosphine to give trans-Fe(CO)_3(PR_3)_2 in high yield. The process has been proved by the reaction of the intermediate Fe(CO)_4(PPh_3) with PPli3 in the presence of excess proton.

Key words: SUBSTITUTION REACTION, IRON COMPOUNDS, CARBONYL COMPOUNDS, NUCLEOPHILIC REACTION

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