Organic compounds -- part of the class 532-570 series – Organic compounds – Silicon containing
Patent
1997-07-15
1999-02-23
Shaver, Paul F.
Organic compounds -- part of the class 532-570 series
Organic compounds
Silicon containing
556400, 556430, 556450, 556489, C07F 708, C07F 718
Patent
active
058746030
ABSTRACT:
A branched alkylsilane includes a branched hydrocarbon backbone which has a linear or branched alkylsilyl moiety extending asymmetrically from the backbone such that the backbone has a first portion and a second portion extending from the moiety. The second portion has two carbon atoms more than the first portion, and the alkylsilyl moiety includes at least one hydrolyzable group bound to silicon for reacting with a substrate. A method for preparing a branched alkylsilane useful for chromatographic applications includes the steps of preparing a vinylidene olefin by dimerization of an .alpha.-olefin and reacting it with a monomeric silane having a silicon-hydrogen bond in the presence of a metallic catalyst such that the silicon-hydrogen bond is added to the vinylidene double bond of the vinylidene olefin thereby converting the double bond to a single bond and bonding the silicon of the monomeric silane to the vinylidene olefin to form a branched alkylsilane.
REFERENCES:
patent: 5710301 (1998-01-01), Fujiki
Csaba Horvath, "Reversed Phase Chromatography With Alkyl-Silica Stationary Phases," D.E. Leyden et al., Silylated Surfaces (1980), pp. 269-300.
S.A. Wise et al., "Investigations of Selectivity In Reversed-Phase Liquid Chromatography On Chemically Bonded C.sub.18 Phases," D.E. Leyden Silanes Surfaces Interfaces (1986), pp. 349-370.
"C20-C24 Alpha Olefin Fraction," Product Data Sheet of Chevron, Houston, TX (1993).
"C24-C28 Alpha Olefin Fraction," Product Data Sheet of Chevron, Houston, TX (1993).
"1-Octadecene," Product Data Sheet of Chevron, Houston, TX (1993).
Van Der Voort et al., "Silylation Of The Silica Surface A Review," J. Liq. Chrom. & Relat. Technol., vol. 19, Issues 17 & 18 (1996), pp. 2723-2752.
Gelest Inc.
Shaver Paul F.
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