Cr (4d), Mo (5d), W (6d)]. The 1,1′-bis(diorganophosphanostannyl)ferrocenes [R = tBu (3b), Ph (3d)] were prepared for comparison of NMR data. The ferrocenophanes 2 are fluxional with respect to fast movement of the cyclopentadienyl rings which induces inversion at the pyramidal phosphorus atom. This dynamic process is slow in the cases of 2d(As) and of the pentacarbonyl complexes 4d - 6d. All new compounds
1,1,3,3-Tetramethyl-2-organo(R)-1,3-distanna-2-phospha-[3]
二茂铁 [R = Me (2a), tBu (2b),
C6H11 (2c), Ph (2d)] 和一种 arsa 类似物 2d(As) 分别从 1,1'-双(
氯二甲基锡基)
二茂铁 1 与双(三甲基甲
硅烷基)甲基
磷烷或二
锂衍
生物 Li2PR 和 Li2AsPh 的反应中获得。所有化合物 2 通过 Sn-P 键的断裂和已知的 1,3-distanna-2-chalcogena-[3]ferrocenophanes 的形成与
硫属元素(氧、
硫、
硒)反应。相比之下,2d 捕获五羰基
金属片段 [M(CO)5] 以产生稳定的
磷烷配合物 [M = Cr (4d), Mo (5d), W (6d)]。制备 1,1'-双(二有机
磷酰胺基)
二茂铁 [R = tBu (3b), Ph (3d)] 用于比较