14814-09-6Relevant articles and documents
ELECTRONIC SPECTRA AND ELECTRONIC STRUCTURE OF TRIALKOXYSILYLALKANETHIOLS
Ermakov, A. I.,Kirichenko, E. A.,Makrushin, N. A.,Vlasova, N. N.,Maroshina, M. Yu.,Voronkov, M. G.
, p. 46 - 51 (1987)
The ultraviolet absorption spectra of solutions of trialkoxysilylalkanethiols (RO)3Si(CH2)nSH (R=CH3, C2H5; n=1, 2, 3) and also of CH3Si(OC2H5)3 and C2H5Si(OC2H5)2 in heptane and acetonitrile were obtained in the region of 4.0-5.3x106 m-1.Analysis of the obtained photoelectron spectra of the triorganosilylalkanethiols X3Si(CH2)nSH (X=CH3, OCH3; n=1, 3) showed that the first photo-ionization potentials of the trialkoxysilylalkanethiols are lower than the values for the corresponding methyl derivatives.This is due to the participation of the n electrons of the oxygen atom of the methoxyl groups in destabilization of the highest occupied molecular orbital.An empirical and quantumchemical interpretation of the obtained spectra is given.
Method for preparing mercaptosilane in virtue of thiourea process
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Paragraph 0026-0028, (2020/09/30)
The invention relates to a method for preparing mercaptosilane in virtue of a thiourea process, belonging to the technical field of fine chemical engineering. The method comprises the following steps:dropwise adding an alcoholic solution of thiourea into chloropropyl siloxy silane and dodecyl trimethyl phosphorus bromide, carrying out a condensation reaction and an aging reaction, and conductingstanding for layering to obtain a mercaptosilane product. According to the invention, an isomerization reaction is inhibited by adjusting reaction conditions; the consumption of thiourea is reduced; ethylenediamine is used as a neutralization initiator, so solid by-products can be greatly reduced; and a guanidine salt state can be changed, so a crude product and a salt can be better separated, operation is simplified, and yield is improved.
Preparation method of mercaptopropyl alkoxysilane
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Paragraph 0013-0014; 0016-0018; 0019-0024; 0025-0027, (2018/06/15)
The invention relates to a preparation method of mercaptopropyl alkoxysilane, and belongs to the field of organic fine chemical industry. The preparation method comprises the following steps: dissolving anhydrous sodium sulfide into an alcohol solvent, dropwise adding an acetic acid solution to convert the sodium sulfide solution into an alcohol solution of sodium hydrosulfide, and then reacting with chloropropyl alkoxysilane under the action of a phase transfer catalyst to produce the mercaptopropyl alkoxysilane, sodium chloride and sodium acetate; firstly primarily distilling an obtained crude product at low-temperature negative pressure to distill out the alcohol solvent and completely separate out the sodium chloride and sodium acetate, then performing filtering separation, and then rectifying an obtained filtrate to obtain a mercaptopropyl alkoxysilane product. The obtained mercaptopropyl alkoxysilane product has the content being higher than 99.0% and the yield being higher than95%; compared with other synthesis methods, the preparation method provided by the invention has the advantages of a high product content, a high yield, easy obtainment of raw materials, simple synthesis steps, no guanidinium salt byproducts, no use of a dangerous hydrogen sulfide raw material and the like.