US 2013/0274497 A1 · LOW MOLECULAR WEIGHT CARBOSILANES, PRECURSORS THEREOF, AND METHODS OF PREPARATION

Abstract

A series of silicon compounds are provided, which are excellent precursors to small carbosilanes, such as 1,3,5-trisilapentane, 2,4,6-trisilaheptane, tris(silylmethyl)silane and tetrakis(silylmethyl)silane. A method of preparing a carbosilane involves forming a Grignard, lithium, or metallic reagent from a halomethyltrialkoxysilane, reacting the Grignard, lithium, or metallic reagent with a dihalodihydridosilane, a trihalohydridosilane, a tetrahalosilane, a dialkoxydihydridosilane, a trialkoxyhydridosilane, or a tetraalkoxysilane to yield a carbosilane precursor, and reducing the precursor to form the carbosilane.

Claims35

Dependent claims

A silicon compound having formula (I):

wherein R1 and R4 are independently selected from the group consisting of hydrogen, linear alkyl groups having about one to about four carbon atoms, and linear or branched alkoxy groups having one to about eight carbon atoms, R2, R3, R5, and R6 are each independently selected from the group consisting of branched alkyl groups having about three to about eight carbon atoms, and R7 and R8 are each independently selected from the group consisting of hydrogen, chlorine, bromine, iodine, linear and branched alkoxy groups having one to about eight carbon atoms, and substituted and unsubstituted linear and branched alkyl groups having one to about eight carbon atoms, wherein the silicon compound is a carbosilane precursor.

Dependencies are inferred from the claim text.

Facts

Application

13/777,704Filed 26 Feb 2013

Priority

11 Apr 2012

Published

17 Oct 2013

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

C07F 7/1804
Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages: compounds having Si-O-C linkages
C07F 7/0805
Compounds with Si-C or Si-Si linkages: comprising only Si, C or H atoms
C07F 7/083
Preparations of compounds not comprising Si-Si or Si-cyano linkages: syntheses without formation of a Si-C bond
C07F 7/0838
Compounds having one or more O-Si linkage: compounds with one or more Si-O-Si sequences

Low molecular weight carbosilanes, precursors thereof, and methods of preparation

Life of this patent

Low molecular weight carbosilanes, precursors thereof, and methods of preparation

Life of this patent

Abstract

Claims35