H-combustion analyses. The molecular structures of 3a and 3c were additionally confirmed by X-ray crystal structure analyses, showing that they consist of Zr2P2 rings with significantly shorter Zr–P distances than those observed in 1a and 1c. Interestingly, the dehydrogenation of the mostly sterically crowded derivative 1c occurs also in boiling toluene solutions without using a catalyst, but the process is
新型
锆(+3)甲
硅烷基膦基配合物[Cp2ZrP(H)R]2} 1a Cp = η5-
C5H5; 报道了 R = SiMe2C(iPr)Me2}、1b (R = SiiPr3) 和 1c (R = SiF(tBu)(2,4,6-iPr3C6H2)。后者很容易通过
锂盐的反应获得相应的初级甲
硅烷基膦与施瓦茨试剂 [Cp2Zr(H)Cl] 在 –70 °C 的 THF 中。它们可以以抗磁性红黑色晶体的形式以 68–85% 的产率分离。配合物的中心结构基序由平面 (1a, 1b) 和略微褶皱的 Zr2P2 环 (1c) 组成,并包含两个 d1-Zr(+3) 中心,它们是反
铁磁耦合的(超级交换,通过键相互作用),尽管跨环 Zr-Zr 分离是大约 360 pm。因此,这些化合物具有双自由基电子结构。在 Pd/C 或 [(Ph3P)2Pt(
C2H4)] 存在下加热 1a-c 在
甲苯中的溶液导致 P-H