Functionalized Bis(pentafluoroethyl)phosphanes: Improved Syntheses and Molecular Structures in the Gas Phase
作者:Alexander V. Zakharov、Yury V. Vishnevskiy、Nadine Allefeld、Julia Bader、Boris Kurscheid、Simon Steinhauer、Berthold Hoge、Beate Neumann、Hans‐Georg Stammler、Raphael J. F. Berger、Norbert W. Mitzel
DOI:10.1002/ejic.201300364
日期:2013.7
angstrom and re(P-O) = 1.582(3) angstrom for (C2F5)2POH. The different coordination properties of (C2F5)3P, (C2F5)2POH, (CF3)3P and (CF3)2POH were evaluated by complex formation with [Ni(CO)4]: the maximum achievable number of CO ligands substituted by (C2F5)3P is 1, by (C2F5)2POH is 2, by (CF3)3P is 3 and by the smallest ligand (CF3)2POH is 4.
(C2F5)2PNEt2 是选择性合成双(五氟乙基)膦衍生物的优良原料。通过用 C2F5Li 处理 Cl2PNEt2,可在多克规模上获得中等空气敏感性的氨基膦。用气态 HCl 或 HBr 处理产生相应的磷卤化物 (C2F5)2PCl 和迄今为止未知的 (C2F5)2PBr,收率良好。迄今为止未知的 (C2F5)2PF 是通过用过量的三氟化锑处理 (C2F5)2PBr 获得的。用 Bu3SnH 处理 (C2F5)2PCl 导致 (C2F5)2PH 的定量形成。去质子化正式产生 (C2F5)2P- 阴离子,该阴离子通过与汞离子配位而稳定,形成复合物 [HgP(C2F5)2}2(dppe)]。通过用对甲苯磺酸处理 (C2F5)2PNEt2,提高了 (C2F5)2POH 的高产率合成。(C2F5)2PH 和 (C2F5)2POH 的气相结构由电子衍射确定。衍射数据的数据分析中采用的振动校正来自分子动力学计算。就