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亚基与Sn[N(SiMe3)2]2的反应 - - 孤立一个稳定的三金属Sn (I) 基离子
Andrea O'Reilly1, Andrew M S Booth1, George W A Smith1
1School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, 6012, New Zealand.
Chemistry (Weinheim an der Bergstrasse, Germany)
|February 15, 2025
概括
这项研究揭示了新的-集群和一个独特的 (I) 基离子. 这些发现扩大了对低价值主要组元素化学和结合的理解.
科学领域:
- 有机金属化学 有机金属化学
- 主群 化学 化学
- 集群化学 集群化学
背景情况:
- -氨基复合物具有独特的反应性.
- 斯坦尼是集群的多功能前体.
- 低价值主要组元素集群具有重要的合成和理论意义.
研究的目的:
- 为了探索氨基与斯坦尼烯的反应性.
- 为了合成和表征新的锡集群化合物.
- 为了研究一个独特的锡 (I) 基离子的电子结构和特性.
主要方法:
- 在和甲基环中,K[Al(NON) ]与Sn[N(SiMe3) 2) 2的反应.
- 用X射线结晶学测定集群化合物的结构.
- 电子偏磁共振 (EPR) 和电子核双共振 (ENDOR) 光谱学.
- 密度函数理论 (DFT) 计算用于电子结构分析.
主要成果:
- 形成一个扭曲的四面体Sn4集群K3[(Sn4){Al(NON)}2{N(SiMe3)2}]与Sn-Sn和Sn-Al-Sn键.
- 隔离了Al (II) 种,以1,4-[Al (NON) ]2 (μ-C6H6) 的二光化环二烯表示.
- 在甲基环中合成一个热稳定的三金属Sn(I) 基离子K[Sn{Al(NON)}2].
- 具有g值高于2和小Sn高精度合的Sn (I) 基离子的独特EPR光谱.
- DFT 计算和 ENDOR 测量证实了 SOMO 在非混合的 5p 轨道中定位,从而消除了旋转轨道的贡献.
结论:
- 反应提供了对新-集群架构的访问.
- 在这种系统中,Al (II) 物种的证据扩大了的已知氧化状态.
- 一个独特的Sn(I) 基离子具有不寻常的光谱和电子特性已经被描述.
- 这些发现有助于理解低价值主要组元素化合物的结合和电子结构.
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