的烯化复合物与-相互作用:中子结构为 (eta(5) -C(5) Me(5)) Me((2) PCH(2) CH(2) PMe(2)) Mo(H) SiEt(2)) 的中子结构
Benjamin V Mork1, T Don Tilley, Arthur J Schultz
1Contribution from the Department of Chemistry, University of California, Berkeley, CA 94720-1460 USA.
Journal of the American Chemical Society
|August 19, 2004
概括
这项研究详细介绍了新型 (((II) 复合物的合成及其与西兰体的反应,形成具有金属化结合的独特的烯和烯复合物.
科学领域:
- 有机金属化学 有机金属化学
- 催化剂的催化剂
- 化学 化学 化学
背景情况:
- 复合物在催化和材料科学中至关重要.
- 了解基和基复合物的反应性是开发新合成方法的关键.
- 低坐标物种的形成和表征仍然是一个活跃的研究领域.
研究的目的:
- 为了合成和表征新的 ((II) 复合物.
- 为了研究这些复合物的与各种西兰的反应性.
- 探索烯和水烯复合物的形成及其结合特性.
主要方法:
- 聚合 (II) 化物复合物Cp (dmpe) (PMe) (3)) 的合成MoCl.
- 与基格里纳德试剂基化以形成pi-基复合物.
- 与非替代和单替代西兰的反应.
- 可变温度NMR光谱和中子衍射研究用于表征.
主要成果:
- 形成一个平衡的18电子pi-基复合物与其16电子eta(1)-基同位素.
- 通过与异位的西兰酸盐反应合成烯复合物Cp(dmpe) Mo(H) ((SiRR').
- 通过与单位替代西兰酸盐的反应生成罕见的基烯复合物Cp(dmpe) Mo(H) Si(H) R.
- 证据表明H.Si结合相互作用,通过在Cp(dmpe) Mo (((H) ((SiEt2) 中桥接化物配体的中子衍射得到证实.
结论:
- 新型 ((II) 复合物可以合成并与西兰酸盐反应,形成西和酸物种.
- 这些复合物表现出显著的H.Si结合,其中化物连接物桥接金属-结合物.
- 该研究提供了有关有机金属化合物的合成和反应性的详细见解.
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