The synthesis and properties of the transannularly bonded electron-rich olefin derived from 1,4,8,11-tetra-azacyclotetradecane; X-ray crystal structure of the chelating cis-dicarbenerhodium(I) salt obtained therefrom
作者:Peter B. Hitchcock、Michael F. Lappert、Pilar Terreros、Kevin P. Wainwright
DOI:10.1039/c39800001180
日期:——
Reaction of 1,4,8,11-tetra-azacyclotetradecane with HC(OMe)2NMe2 yields the olefin (abbreviated as L2cyclam), formed by filling the macrocyclic cavity with a transannularly bound CC bond, this being cleaved by (a) insertion therein of a RhI moiety upon treatment with [Rh(cod)Cl}2](cod = cyclo-octa-1,5-diene) to furnish [Rh(cod)(L2cyclam)][Rh(cod)Cl2](3), or (b) oxidation to give a bis(urea); X-ray analysis
1,4,8,11-四氮杂环十四烷与HC(OMe)2 NMe 2的反应生成烯烃(缩写为L 2 cyclam),该烯烃通过在大环腔中填充跨环结合的C C键而形成,并通过(a)在用[Rh(cod)Cl} 2 ](cod =环辛-1,5-二烯)处理后将Rh I部分插入其中以提供[Rh(cod)(L 2 cyclam)] [ Rh(cod)Cl 2 ](3),或(b)氧化得到双(脲);从(3)和CO到R的螯合二碳鎓(I)配合物的X射线分析= 0·0357,R ′= 0·0716,显示Rh–C(carb,av。)2·02和Rh–(cod)av 2·20Å,以及C(carb)–Rh–C(carb') = 78·1(2)°。