A siliconatom in the zero oxidation state stabilized by two carbene ligands is known as siladicarbene (silylone). There are two pairs of electrons on the siliconatom in silylone. This was recently confirmed by both experimental and theoretical charge density investigations. The silylone is stable up to 195 °C in an inert atmosphere. However, a substoichiometric amount (33 mol%) of potassium metal
由两个卡宾配体稳定的零氧化态硅原子被称为硅二碳烯(甲硅烷)。硅酮的硅原子上有两对电子。最近通过实验和理论电荷密度研究证实了这一点。硅酮在惰性气氛中可在高达 195 °C 的温度下保持稳定。然而,亚化学计量(33 mol%)的钾金属触发了不饱和 C:Si:C 主链的活化,导致以原子经济的方式与叔 CH 键发生选择性反应,形成六元环状亚甲硅烷具有三配位硅原子。循环伏安法表明该反应通过形成甲硅烷基自由基阴离子中间体进行,EPR 光谱进一步证实了这一点。