Reaction Search and Function Development for the Unsaturated Bonding Systems between Transition Metals and Heavier Group 14 Elements

我们发现，对于钨或钌与硅或锗之间具有双键或三键的配合物，取代基的空间位阻的减少导致金属-第14族元素不饱和键的反应性显著增强，并且它们与各种有机分子的反应顺利进行。特别是首次阐明了钨锗三键对有机分子的反应活性。我们还证明了η^3-α-硅苯甲基钨和钼配合物可以作为硅烯配合物和配位不饱和配合物的合成等价物。

We found that, with regard to the complexes having a double or triple bond between tungsten or ruthenium and silicon or germanium, reduction of the steric hindrance of substituents caused the dramatic enhancement of reactivity of the metal-Group 14 element unsaturated bond, and their reactions with various organic molecules proceeded smoothly. Especially, we clarified the reactivity of the tungsten-germanium triple bond toward organic molecules for the first time. We also demonstrated that η^3-α-silabenzyl tungsten and molybdenum complexes serve as the synthetic equivalents of both silylene complexes and coordinatively unsaturated complexes.