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US 2004/0019231 A1Published application
Preparation of mixed-halogen halo-silanes
AssigneeHoneywell International Inc.
InventorsEdward Asirvatham, Jeff Czarnecki, Matthew H. Luly, Lawrence F. Mullan, Alagappan Thenappan
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Abstract
The preparation of halosilanes having mixed-halogen substituents is described comprising providing an aryl-halo-silane having one more first halogens and one or more aryl groups, and substituting one or more of said aryl groups of said aryl-halo-silane with a second halogen having an atomic number greater than that of said first halogen.
Claims32
A process for preparing a mixed-halogen halo-silane comprising:
- providing an aryl-halo-silane having one more first halogens and one or more aryl groups;
- and
- substituting one or more of said aryl groups of said aryl-halo-silane with a second halogen having an atomic number greater than that of said first halogen.
A process for preparing mixed-halogen halo-silanes comprising:
- providing a halo-silane having at least two halogen moiety, said halogen moiety being the same and selected from Cl, Br, and I;
- forming a first intermediate product mixture comprising an intermediate aryl-halo-silane by substituting one or more of said halogen substituents of said halo-silane with a phenyl group;
- isolating a portion of said intermediate phenyl-halo-silane from said first intermediate product mixture based on its number of phenyl groups;
- replacing the halogen substituents of said portion with fluorine substituents, thereby forming a phenyl-fluoro-silane;
- and
- contacting said phenyl-fluoro-silane with HX under anhydrous conditions in the presence of a Lewis acid, where X is selected from Cl, Br, and I, to form said mixed-halogen halo-silane.
3 more elements
Dependencies are inferred from the claim text.