Perchlorinated disilenes and germasilenes and also neopentatetrelanes, a method for the preparation thereof and use thereof

A method for preparing a neopentatetrelane of the formula C,

• wherein each independently in pairs E is Si or Ge;
• E′ is C, Si, or Ge;
• and R is Cl, Me, Et, or Ph, the method comprising:
• (a) dissolving a salt [X4N]— or [X4P]-tris(trichlorosilyl)tetrelide in a solvent,
• wherein the radical X is at least one selected from the group consisting of Me, Et, iPr, nBu, and Ph,
• wherein the tris(trichlorosilyl)tetrelide has the formula A—
• wherein E═Si or Ge;
• (b) reacting the tris(trichlorosilyl)tetrelide dissolved in step (a) with a Lewis acid to produce a disilene or germasilene having the formula B
• wherein E═Si or Ge;
• and
• (c) reacting the disilene or germasilene B with a tetrel chloride R3E′-Cl at a temperature of −80° C. to 40° C. to obtain the neopentatetrelane C,
• wherein E′═C, Si, or Ge, and R═Cl, Me, Et, or Ph;
• or
• (d) contacting the tris(trichlorosilyl)tetrelide dissolved in step (a) with a suspension at a temperature of −80° C. to 40° C. comprising a Lewis acid, a tetrel chloride R3E′-Cl, and a solvent, wherein E′═C, Si, or Ge, and R═Cl, Me, Et, or Ph, to obtain the neopentatetrelane C.

A method for preparing a compound of the formula B,

• wherein E═Si or Ge,
• the method comprising:
• (a) dissolving a salt [X4N]— or [X4P]-tris(trichlorosilyl)tetrelide in a solvent,
• wherein the radical X is at least one selected from the group consisting of Me, Et, iPr, nBu, and Ph,
• wherein the tris(trichlorosilyl)tetrelide has the formula A—
• wherein E═Si or Ge,
• (b) reacting the tris(trichlorosilyl)tetrelide dissolved in step (a) with a Lewis acid and an anthracene or an anthracene derivative to obtain the compound of the formula B.

A method for preparing (Cl3Si)4Ge, comprising:

• (a) dissolving a salt [X4N]— or [X4P]-tris(trichlorosilyl)tetrelide in a solvent,
• wherein the radical X is at least one selected from the group consisting of Me, Et, iPr, nBu, and Ph,
• wherein the tris(trichlorosilyl)tetrelide has the general formula A—
• wherein E═Ge;
• (b) reacting the tris(trichlorosilyl)tetrelide dissolved in step (a) with a Lewis acid to produce a disilene or germasilene having the general formula B
• wherein E═Ge;
• and
• (c) reacting the disilene or germasilene B with a tetrel chloride of Cl4Si at a temperature of −80° C. to 40° C. to obtain (Cl3Si)4Ge;
• or
• (d) contacting the tris(trichlorosilyl)tetrelide dissolved in step (a) with a suspension at a temperature of −80° C. to 40° C. comprising a Lewis acid, a tetrel chloride of Cl4Si, and a solvent to obtain (Cl3Si)4Ge.