含有两个连接的二聚乙烯单元的分子的完全局部化的混合价值氧化产物:一个有效的结构标准
F Albert Cotton1, Naresh S Dalal, Chun Y Liu
1Laboratory for Molecular Structure and Bonding, Department of Chemistry, P.O. Box 30012, Texas A&M University, College Station, Texas 77842-3012, USA. cotton@tamu.edu
Journal of the American Chemical Society
|October 16, 2003
概括
化学氧化二molybdenum化合物显示,一个电子的氧化将未配对电子定位在一个单一的Mo(2)(4+) 单元上. 两个电子的氧化结果相当于Mo(2) 单位,两种物种都表现出价值陷.
科学领域:
- 无机化学 无机化学
- 协调化学 协调化学
- 材料科学 材料科学 材料科学
背景情况:
- 之前报道的化合物具有四次结合的Mo(2)(4+) 单元.
- 这些单元由特定的阳离子连接体稳定.
研究的目的:
- 为了研究化学氧化对二molybdenum化合物的影响.
- 描述氧化后的电子和结构变化.
主要方法:
- 前体化合物的化学氧化.
- 氧化产品的隔离和结构特征使用X射线晶体学.
- 电子偏磁共振 (EPR) 光谱学.电子偏磁共振 (EPR) 光谱学.
- 测量磁感应度的测量.
主要成果:
- 一个电子的氧化导致具有不对称结构和明显的Mo-Mo键长度的混合价值离子,表明电子的定位.
- EPR光谱支持在一个Mo(2) 单元上定位未配对电子.
- 两个电子的氧化产生相当的Mo(2) 单位,具有特征性的Mo-Mo键距离.
- 对双氧化物种的EPR和磁性易感性数据显示没有显著的旋转合,表明存在价值陷.
结论:
- 这些二molybdenum化合物的氧化发生在Mo(2) 单位.
- 混合价值物种在固态中被电子定位.
- 这种双氧化化合物具有价值陷,Mo(2) 单元之间没有显著的磁性合.
相关概念视频
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