Rhenium Selenide Clusters Containing Alkynyl Ligands: Unexpected Reactivity of σ-Bound Phenylacetylide
作者:Ernesto Soto、Katherine L. Helmink、Colleen P. Chin、Michael Ferguson、Steven J. Peters、Lisa F. Szczepura
DOI:10.1021/acs.organomet.2c00275
日期:2022.10.10
Three organometallic rhenium-based clusters containing phenylacetylide ligands, [Re6Se8(PEt3)5(C≡C–Ph)](SbF6) (1) and cis- and trans-[Re6Se8(PEt3)4(C≡C–Ph)2] (2 and 3), were synthesized and fully characterized including single-crystal X-ray diffraction analyses. Reactivity studies of 1 show that reaction with electrophilic reagents does not result in the formation of the vinylidene species as predicted;
三种含有苯乙炔配体的有机金属铼簇,[Re 6 Se 8 (PEt 3 ) 5 (C≡C–Ph)](SbF 6 ) ( 1 )和顺- 和反- [Re 6 Se 8 (PEt 3 ) 4 (C≡C–Ph) 2 ] ( 2和3 ) 被合成并充分表征,包括单晶 X 射线衍射分析。1的反应性研究表明与亲电试剂的反应不会导致亚乙烯基物质的形成,如预测的那样;相反,观察到乙炔部分的消除。从这些反应中分离的产物,包括甲基硫酸盐络合物,[Re 6 Se 8 (PEt 3 ) 5 (OSO 3 Me)](SbF 6 ) ( 4 ),与从 [2 + 2] 中获得的产物一起进行了表征1与四氰基乙烯和 7,7,8,8-四氰基醌二甲烷的环加成。比较了所使用的亲电子试剂的相对反应性。初步计算研究揭示了有关 [Re 6 Se8 ] 2+ -乙炔键有助于我们理解与该簇复合物相关的反应性。