Treatment of a toluene solution of [PdMe2(Cy2PCH2PCy2)]
(1) with pentafluoropyridine in the presence of traces of water affords the generation of the A-frame complexes [(PdMe)2μ-κ2(P,P)Cy2PCH2PCy2}2(μ-F)][SiMeF4]
(2a) and [(PdMe)2μ-κ2(P,P)Cy2PCH2PCy2}2(μ-F)][OC5NF4]
(2b). If the reaction is performed in an NMR tube equipped with a PFA inliner, complex 2b is produced, only. Treatment of 1 with pentafluoropyridine in the presence of an excess water yields the pyridyloxy complex [PdMe(OC5NF4)(Cy2PCH2PCy2)]
(3). Compound [(PdMe)2μ-κ2(P,P)Cy2PCH2PCy2}2(μ-F)][FHF]
(2c) bearing a bifluoride anion instead of SiMeF4− or OC5NF4− can be generated by reaction of 1 with substoichiometric amounts of Et3N·3HF. The analogous complex [(PdMe)2μ-κ2(P,P)Ph2PCH2PPh2}2(μ-F)][FHF] (5c) has been synthesized by addition of Ph2PCH2PPh2 to a solution of [PdMe2(Me2NCH2CH2NMe2)]
(4) in THF and subsequent treatment of the reaction mixture with Et3N·3HF. The structure of the A-frame complex 5c has been determined by X-ray crystallography.
对[ PdMe2(Cy2PCH2PCy2)] (1) 的
氨基
甲烷溶液在微量
水存在下与五
氟吡啶反应,生成 A 框架复合物 [(PdMe)2μ-κ2(P,P)Cy2PCH2PCy2}2(μ-F)][SiMeF4] (2a) 和 [(PdMe)2μ-κ2(P,P)Cy2PCH2PCy2}2(μ-F)][OC5NF4] (2b)。如果反应在配有 PFA 内衬的 NMR 管中进行,则仅产生复合物 2b。在过量
水存在下将 1 与五
氟吡啶反应,可以得到
吡啶氧复合物 [PdMe(OC5NF4)(Cy2PCH2PCy2)] (3)。复合物 [(PdMe)2μ-κ2(P,P)Cy2PCH2PCy2}2(μ-F)][FHF] (2c),其含有双
氟离子而非 SiMeF4− 或 OC5NF4−,可以通过将 1 与亚摩尔量的 Et3N·3HF 反应生成。类似的复合物 [(PdMe)2μ-κ2(P,P)Ph2PCH2PPh2}2(μ-F)][FHF] (5c) 是通过将 Ph2PCH2PPh2 加入到 [PdMe2(Me2NCH2CH2NMe2)] (4) 在
四氢呋喃中的溶液中,然后用 Et3N·3HF 处理反应混合物合成的。A 框架复合物 5c 的结构已通过 X 射线晶体学确定。