Synthesis of Long, Palladium End-Capped Polyynes through the Use of Asymmetric 1-Iodopolyynes.
Synthesis of Long, Palladium End-Capped Polyynes through the Use of Asymmetric 1-Iodopolyynes.
复制标题
使用不对称 1-碘多炔合成长钯封端多炔。
作者：
Bartłomiej Pigulski;N. Gulia;S. Szafert
据报道，合成了一系列独特的长的、不对称的 1-碘多炔（1-Cn I 和 2-Cn I），其碳链为 sp 杂化，直至十戊烷。然后将这些化合物用作与 Pd(PPh3 )4 反应的底物，产生另一系列钯封端的多炔，其在溶液中不稳定。有机金属八四炔1-C8 [Pd]I、2-C8 [Pd]I和十戊烯1-C10 [Pd]I是迄今为止报道的具有最长碳链的钯封端多炔化合物。所有配合物及其有机前体均通过 NMR、HRMS(ESI)、IR、TGA-DTA 和 UV/Vis 技术进行了全面表征，并给出了两种甲硅烷基保护的前体和一种钯配合物的 X 射线晶体结构。钯物质的合成方法被设想为合成不稳定的有机金属多炔的一般路线。
The synthesis of a unique series of long, asymmetric 1-iodopolyynes (1-Cn I and 2-Cn I) with the sp-hybridized carbon chain up to a decapentayne is reported. These compounds were then used as substrates in reactions with Pd(PPh3 )4 leading to another series of palladium end-capped polyynes, which were unstable in solution. Organometallic octatetraynes 1-C8 [Pd]I, 2-C8 [Pd]I, and decapentayne 1-C10 [Pd]I are palladium end-capped polyyne compounds with the longest carbon chains reported so far. All the complexes as well as their organic precursors were fully characterized by NMR, HRMS(ESI), IR, TGA-DTA, and UV/Vis techniques, and the X-ray crystal structures of two silyl-protected precursors and one palladium complex are presented. The synthetic approach for palladium species is envisioned as a general route for the synthesis of labile organometallic polyynes.