Octadecyltrichlorosilane

Octadecyltrichlorosilane
Other names Trichlorooctadecylsilane Stearyltrichrlorosilane
Identifiers
Abbreviations	OTS
CAS number	112-04-9 Y
EC number	203-930-7
Jmol-3D images	Image 1
SMILES CCCCCCCCCCCCCCCCCCSi(Cl)(Cl)Cl
Properties
Molecular formula	C18H37Cl3Si
Molar mass	387.93 g mol−1
Appearance	Colorless liquid
Density	0.984 g/mL, liquid
Boiling point	223 °C, 496 K, 433 °F (at 10 Torr)
Hazards
EU classification	Corrosive (C)
S-phrases	S26 S27 S36 S37 S39
NFPA 704	2 3 2
Related compounds
Related Chlorosilanes	Dodecyltrichlorosilane
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox 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.

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

1. ^ Beauty is Just One Layer: Introduction to Self Assembled Monolayers
2. ^ http://www.ruhr-uni-bochum.de/pc1/deutsch/pub/131.htm
3. ^ Sony Develops TFT Substrate Entirely Formed by Organic Materials - Tech-On!