Octadecyltrichlorosilane

Octadecyltrichlorosilane
Names
	IUPAC name n-Octadecyltrichlorosilane
	Other names Trichlorooctadecylsilane; Stearyltrichlorosilane
Identifiers
CAS Number	112-04-9 ;
3D model (JSmol)	Interactive image;
Abbreviations	ODTS
ChemSpider	7865 ;
ECHA InfoCard	100.003.573
EC Number	203-930-7;
PubChem CID	8157;
UNII	1QLE771PKE ;
CompTox Dashboard (EPA)	DTXSID50868051 ;
	InChI InChI=1S/C18H37Cl3Si/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-22(19,20)21/h2-18H2,1H3 Key: PYJJCSYBSYXGQQ-UHFFFAOYSA-N ; InChI=1/C18H37Cl3Si/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-22(19,20)21/h2-18H2,1H3 Key: PYJJCSYBSYXGQQ-UHFFFAOYAA;
	SMILES CCCCCCCCCCCCCCCCCC[Si](Cl)(Cl)Cl;
Properties
Chemical formula	C18H37Cl3Si
Molar mass	387.93 g·mol−1
Appearance	Colorless liquid
Density	0.984 g/mL, liquid
Boiling point	223 °C (433 °F; 496 K) at 10 Torr
Solubility	soluble in ether, THF, THP, hydrocarbons, tetrachloroethylene[1]
Hazards
Main hazards	flammable, corrosive
EU classification (DSD) (outdated)	Corrosive (C)
S-phrases (outdated)	S26 S27 S36 S37 S39
NFPA 704 (fire diamond)	2 3 2
Related compounds
Related Chlorosilanes	Dodecyltrichlorosilane
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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	Infobox references

Octadecyltrichlorosilane (ODTS or n-octadecyltrichlorosilane) is an organosilicon 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 with water, and is also sensitive to air. It is corrosive and can severely damage mucous membranes. Its EINECS number is 203-930-7.

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.[2]

ODTS finds its use in molecular electronics, as thin insulating gates in metal-insulator-semiconductor field-effect transistors.[3]

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

ODTS-PVP films are used in organic-substrate LCD displays.[4]

References

"Beauty is Just One Layer: Introduction to Self Assembled Monolayers". Archived from the original on May 5, 2004.
http://www.ruhr-uni-bochum.de/pc1/deutsch/pub/131.htm%5B%5D
XTECH, NIKKEI. "Sony Develops TFT Substrate Entirely Formed by Organic Materials". NIKKEI XTECH.

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[2] "Beauty is Just One Layer: Introduction to Self Assembled Monolayers". Archived from the original on May 5, 2004.

[3] ttp://www.ruhr-uni-bochum.de/pc1/deutsch/pub/131.htm%5B%5D

[4] XTECH, NIKKEI. "Sony Develops TFT Substrate Entirely Formed by Organic Materials". NIKKEI XTECH.