di-tert-butyldipyridoimidazolinylidene, M = Cr, W) were synthesized and their spectroscopic and structural properties compared with the literature known N-heterocyclic carbene (NHC) group 6 metal pentacarbonyl complexes. This reveals that the 13C NMR carbene signals of theses complexes with dipyrido carbene ligands show the strongest high-field shift ever observed for M(CO)5(NHC) (M = Cr, W) complexes
据报道,二
吡啶并卡宾首次用作过渡
金属络合物的Arduengo-Wanzlick型卡宾
配体。合成了配合物M(CO)5 L(L =二
吡啶并
咪唑啉亚基,二叔丁基二
吡啶并
咪唑啉亚基,M = Cr,W),并与已知的N-杂环卡宾(NHC)6族
金属五羰基配合物进行了比较,研究了它们的光谱和结构性质。。这表明这些具有二
吡啶基卡宾
配体的配合物的13 C NMR卡宾信号显示出有史以来对M(CO)5(NHC)(M = Cr,W)配合物观察到的最强的高场位移。结构表征显示在
配体的共轭二
吡啶基部分中交替的单键和双键。