562-90-3 Usage
Description
Silicon tetraacetate, also known as tetraacetoxysilane, is an off-white crystalline solid with an acrid odor of acetic acid. It is a versatile compound that serves as an alternative to silicon hydride and alkoxide for low-temperature silicon dioxide (SiO2) production. Silicon tetraacetate hydrolyzes in the presence of moisture, releasing acetic acid and forming silanols, which can react with themselves to produce siloxanes or bind to inorganic substrates.
Uses
Used in Thin Film Preparation:
Silicon tetraacetate is used as a precursor in the preparation of silicon dioxide thin films by a direct photochemical vapor deposition method. This application is particularly useful in the semiconductor and electronics industries for creating high-quality thin films with desired properties.
Used in Silicon Complexes Synthesis:
It serves as a precursor to prepare silicon complexes with monofunctional bidentate Schiff bases. These complexes have potential applications in various fields, including materials science and catalysis.
Used in Low-Temperature SiO2 Production:
Silicon tetraacetate is used as an alternative to silicon hydride and alkoxide for low-temperature silicon dioxide production. This makes it a valuable compound for processes that require lower temperatures, reducing energy consumption and potential side reactions.
Used in Silica Gel and Ethyl Acetate Synthesis:
It reacts with ethanol in the absence of water to produce silica gel and ethyl acetate. Silica gel is widely used as a desiccant, adsorbent, and catalyst support, while ethyl acetate is a common solvent in various industries.
Used as a Sol-Gel Precursor:
Silicon tetraacetate is employed as a sol-gel precursor, which is a method for producing solid materials from small molecular precursors. The sol-gel process is used in various applications, including the production of optical fibers, coatings, and advanced materials with unique properties.
Purification Methods
It can be crystallised from mixtures of CCl4 and pet ether or Et2O, or from acetic anhydride and then dried in a vacuum desiccator over KOH. Ac2O adheres to the crystals and is removed first by drying at room temperature, then at 100o for several hours. It is soluble in Me2CO, is very hygroscopic and effervesces with H2O. It decomposes at 160-170o. [Schenk in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 701 1963, Beilstein 2 H 171.]
Check Digit Verification of cas no
The CAS Registry Mumber 562-90-3 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 5,6 and 2 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 562-90:
(5*5)+(4*6)+(3*2)+(2*9)+(1*0)=73
73 % 10 = 3
So 562-90-3 is a valid CAS Registry Number.
InChI:InChI=1/4C2H4O2.Si/c4*1-2(3)4;/h4*1H3,(H,3,4);/q;;;;+4/p-4
562-90-3Relevant articles and documents
Reaction of Acetoxysilanes with Hydroxy Compounds
Kopylov, V. M.,Kireev, V. V.,Ivanov, V. V.,Astaf'ev, G. Yu.,Kozlov, Yu. V.
, p. 1924 - 1928 (2007/10/03)
Tetraacetoxysilane reacts with hexanol, cyclohexanol, and phenol to give products of complete or partial replacement of the acetoxy groups. The rate of hydrolysis of the SiOR group in alkoxy(phenoxy)-silanes and alkoxy(phenoxy)acetoxysilanes in homogeneous (THF) and heterogeneous media (on cellulose surface) increases in the series c=Si-OC6H5 > =Si-OC6H13 > =Si-OC6H11.
Structural investiagations of zirconium tetra-acetate and the group IVB tetra-acetates
Straughan, B. P.,Moore, W.,McLaughlin, R.
, p. 451 - 456 (2007/10/02)
Solid-state i.r., Raman 1H and 13C NMR spectra are reported for solid zirconium tetra-acetate and for the group IVB tetra-acetates (M=Si, Ge, Sn or Pb).The types of acetate co-ordination have been identified: Zr(OAc)4 has a polymeric eight-co-ordinate structure and contains both bridging and bidentate acetate groups; Si(OAc)4 and Ge(OAc)4 contain only unidentate acetates to give four-co-ordinate structures while Sn(OAc)4 and Pb(OAc)4 contain only bidentate acetate groups to give eight-co-ordinate monomeric structures.The solid-state Raman 13C NMR spectra are reported for the first time.
