A soluble molecular variant of the semiconducting silicondiselenide.

Silicondiselenide is a semiconductor and exists as an insoluble polymer (SiSe) which is prepared by reacting elemental silicon with selenium powder in the temperature range of 400-850 °C. Herein, we report on the synthesis, isolation, and characterization of carbene stabilized molecular silicondiselenide in the form of (cAAC)SiSe () [cAAC = cyclic alkyl(amino)carbene]. is synthesized reaction of diatomic silicon(0) compound (cAAC)Si () with black selenium powder at -78 °C to room temperature. The intensely orange colored compound is soluble in polar organic solvents and stable at room temperature for a month under an inert atmosphere. decomposes above 245 °C. The molecular structure of has been confirmed by X-ray single crystal diffraction. It is also characterized by UV-vis, IR, Raman spectroscopy and mass spectrometry. The stability, bonding, and electron density distributions of have been studied by theoretical calculations.