Octadecyltrichlorosilane

Octadecyltrichlorosilane

General
Other names	OTS n-Octadecyltrichlorosilane Trichlorooctadecylsilane Stearyltrichrlorosilane
Molecular formula	C₁₈H₃₇Cl₃Si
SMILES	CCCCCCCCCCCCCCCCCCSi(Cl)(Cl)Cl
Molar mass	387.94 g/mol
Appearance	colorless liquid
CAS number	[112-04-9]
Properties
Density and phase	0.984 g/mL, liquid
Solubility in water	decomposes
Melting point	? °C (? K)
Boiling point	223 °C (496 K) at 10 Torr
Triple point	? K, ? bar
Critical temperature	? K (? °C) at ? MPa (? atm)
Structure
Molecular shape	?
Symmetry group	?
Dipole moment	?
Hazards
MSDS	External MSDS
EU classification	Corrosive (C)
NFPA 704	2 3 2
R-phrases	R14, R20, R21, R22, R34
S-phrases	S26, S27, S36, S37, S39
Flash point	89 °C
Autoignition temperature	? °C
Maximum burning temperature:	? °C
Explosive limits	?
Related compounds
Related chlorosilanes	Dodecyltrichlorosilane
Related compounds
Related hydrides	Silane
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Octadecyltrichlorosilane (OTS, or n-octadecyltrichlorosilane) is an organometallic chemical. It is used in semiconductor industry to form self-assembled monolayer thin films on silicon dioxide substrates. Its structural chemical formula is CH₃(CH₂)₁₇SiCl₃. It is flammable, reacts violently with water, and is sensitive to air. It is corrosive and can severely damage mucous membranes. Its EINECS number is 203-930-7.

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Octadecyltrichlorosilane is an amphiphilic molecule consisting of a long-chain alkyl group (C₁₈H₃₇–) and a polar head group (SiCl₃–), which forms Self-Assembled Monolayers (SAMs) on various oxidic substrates. ^[1]

OTS finds its use in molecular electronics, as thin insulating gates in Metal-Insulator Semiconductors. ^[2]

Dodecyltrichlorosilane, an OTS analog with shorter alkyl chain, is used for the same purpose as well.

OTS-PVP films are used in organic-substrate LCD displays. ^[3]

References

^ Beauty is Just One Layer: Introduction to Self-Assembled Monolayers
^ http://www.ruhr-uni-bochum.de/pc1/deutsch/pub/131.htm
^ http://techon.nikkeibp.co.jp/english/NEWS_EN/20060609/118041/

External links

Category: Organosilicon compounds

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Octadecyltrichlorosilane". A list of authors is available in Wikipedia.

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