Reactivity of Cationic Agostic and Carbene Structures Derived from Platinum(II) Metallacycles
作者:Jesús Campos、Laura Ortega-Moreno、Salvador Conejero、Riccardo Peloso、Joaquín López-Serrano、Celia Maya、Ernesto Carmona
DOI:10.1002/chem.201500756
日期:2015.6.8
the phosphine ligands participates in a δ‐agostic interaction. DFT calculations reveal that H2 activation by 8 occurs at the highly electrophilic alkylidene terminus with no participation of the metal. The two compounds 4 a and 8 experience C–C coupling reactions of a different nature. Thus, 4 a gives rise to complex trans‐[PtH(E)‐1,2‐bis(2‐(PiPr2)‐3‐MeC6H3)CHCH}] (7) that contains a tridentate diphosphine–alkene
本文描述了由膦配体P i Pr 2 Xyl,PMeXyl 2和PMe 2 Ar (Xyl = 2,6-Me 2 C 6 H 3和Ar = 2,6-(2, 6‐Me 2 C 6 H 3)2‐ C 6 H 3)以及从P i Pr 2 Xyl衍生的反式[Pt(C ^ P)2 ]双金属环配合物1a的反应性研究。化合物的质子化1与[H(OET2)2 ] [巴˚F ](巴˚F = B [3,5-(CF 3)2 C ^ 6 ħ 3 ] 4)形成阳离子δ-agostic结构4,而α-氢化物提取采用[PH 3 Ç ] [PF 6 ]产生阳离子铂卡宾反式-[Pt P i Pr 2(2,6-CH(Me)C 6 H 3 } P i Pr 2(2,6-CH 2(Me)C 6 H 3 }] [PF 6 ](8)。化合物4和8用H反应2产生相同1:3平衡混合物4和反式- [PTH(P我镨2的Xyl)2 ] [巴˚F