Chlorosilylarylgermanes, method for preparation thereof and use thereof
A novel compound chlorosilylarylgermane, a method for preparing the compound, and the use of the compound are described. A method for preparing trichlorosilyltrichlorogermane and the use of trichlorosilyltrichlorogermane are also described.
1. A chlorosilylarylgermane of formula (I):
XGe(Y 2 )—SiCl 3 (I),
where X=Y or X=[—Ge(Y 2 )—SiCl 3 ] and
each Y is independently a phenyl group.
2. The chlorosilylarylgermane according to claim 1 , which is selected from the group consisting of trichlorosilyltriphenylgermane and 1,2-bis(trichlorosilyl)-1,1,2,2-tetraphenyldigermane.
3. A method for preparing the chlorosilylarylgermane according to claim 1 , the method comprising:
(a) dissolving an arylchlorogermane with hexachlorodisilane in a solvent and
(b) reacting in the presence of a catalyst at a temperature of 5 to 40° C., wherein the aryl groups of the arylchlorogermane are each independently phenyl.
4. The method according to claim 3 , wherein the reacting (b) is carried out at room temperature.
5. The method according to claim 3 , wherein
the arylchlorogermane is at least one selected from the group consisting of
a triarylchlorogermane and a diaryldichlorogermane,
a molar ratio of the triarylchlorogermane, when present, to hexachlorodisilane is 1:1, and
a molar ratio of the diaryldichlorogermane, when present, to hexachlorodisilane is 1:2.
6. The method according to claim 3 , wherein the arylchlorogermane is at least one selected from the group consisting of triphenylchlorogermane and diphenyldichlorogermane.
7. The method according to claim 3 , wherein the solvent is dichloromethane.
8. The method according to claim 3 , wherein the catalyst comprises a phosphonium chloride [R 4 P]Cl or an ammonium chloride salt [R 4 N]Cl, where each R is independently Me, Et, iPr, nBu, Ph.
9. The method according to claim 3 , wherein the catalyst is used in an amount of 0.001 to 1 mol per mole of hexachlorodisilane.
10. The method according to claim 3 , wherein at least 5 mol of the solvent is used per mole of hexachlorodisilane.
11. The method according to claim 3 , wherein
the reacting (b) is carried out with thorough mixing and over a period of 1 to 24 hours,
the solvent is subsequently removed, and
the chlorosilylarylgermane is obtained as a crystalline product.
12. A method for generating a GeSi layer, the method comprising:
preparing the GeSi layer from the chlorosilylarylgermane according to claim 1 .
13. A method for preparing trichlorosilyltrichlorogermane, the method comprising:
dissolving GeCl 4 with hexachlorodisilane in a solvent and reacting in the presence of a catalyst at a temperature of 5 to 40° C.
14. A method for generating a GeSi layer, the method comprising:
preparing the GeSi layer from trichlorosilyltrichlorogermane obtained by the method according to claim 13 .