大学化学 >> 2019, Vol. 34 >> Issue (7): 95-99.doi: 10.3866/PKU.DXHX201901034

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棕色环反应产物中铁氧化态的讨论

钱禹轩,陈涛,陈晓峰,包建春,方敏*(),杜江燕,吴勇*()   

  • 收稿日期:2019-01-24 发布日期:2019-04-11
  • 通讯作者: 方敏,吴勇 E-mail:fangmin@njnu.edu.cn;wuyong@njnu.edu.cn
  • 基金资助:
    江苏省研究生教育教学改革重点课题(JGZZ18_029);南京师范大学重点教材资助项目(1812200009171705);南京师范大学重点教材资助项目(1812200009171813);南京师范大学在线开放课程资助项目(1812200001ZXKC1705)

Discussion on Iron Oxidation State in "Brown-Ring" Reaction Product

Yuxuan QIAN,Tao CHEN,Xiaofeng CHEN,Jianchun BAO,Min FANG*(),Jiangyan DU,Yong WU*()   

  • Received:2019-01-24 Published:2019-04-11
  • Contact: Min FANG,Yong WU E-mail:fangmin@njnu.edu.cn;wuyong@njnu.edu.cn
  • Supported by:
    江苏省研究生教育教学改革重点课题(JGZZ18_029);南京师范大学重点教材资助项目(1812200009171705);南京师范大学重点教材资助项目(1812200009171813);南京师范大学在线开放课程资助项目(1812200001ZXKC1705)

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摘要：

详细讨论了棕色环反应产物[Fe（NO）（H2O）5]2+中心铁离子的氧化态及Fe与NO的成键情况。综合文献中各种实验证据和理论计算，铁的氧化态在+2与+3之间共振，并偏向于+2。Fe-N-O的键角为180°，并对成键后NO键长略微变短进行了解释。

关键词: 棕色环反应, 铁氧化态, 键角, 键长

Abstract:

The oxidation state of iron in the "brown-ring" reaction product[Fe(NO)(H2O)5]2+ and the bond between Fe and NO in this cation are discussed in detail. After presenting different views from the literature based on experimental evidences and theoretical calculations, the oxidation state of iron resonates between +2 and +3 inclining to +2. The Fe-N-O bond angle is 180°. In addition, we proposed an explanation for the slightly shortening of the bond length of NO after coordination to the iron ion.

Key words: Brown-ring reaction, Oxidation state of Iron, Bond angle, Bond length