Ammonolysis of 1,2-Bis(methyldichlorosilyl)ethane leads to a cross-linked polymer and a low-molecular tricyclic compound. The cyclic compound can be further converted to Bis-methoxy-ethylene and used as a solvent.
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Ammonolysis of Bis methyldichlorosilyl ethane
Ammonolysis is a chemical process used to generate a tricyclic, cross-linked polymer from 1,2-bis(methyldichlorosilyl)ethane and its derivatives. The ammonolytic process is advantageous as it provides a complete reaction and produces a chlorine-free end product. The reaction takes place at a temperature between -80 and +120 degrees Celsius.
Ammoniak and Dichlorhydridoalkylsilan are two important components of the reaction. The methylammonium component in the reaction is a necessary prerequisite. This compound is preferred over aliphatic solvents as it has excellent abtrennbarkeit and lossability.
The reaction occurs at higher temperatures than the temperature of the solvent. At these temperatures, the mass catalysts undergo decomposition reactions. The products of the reaction are generally hydrocarbons and amines. Afterwards, the compounds are separated as monomers. This process is repeated until there is no longer any reaction product.
The reaction was carried out in a two-neck flask equipped with a thermometer and a dropping funnel. The reaction mixture was ruhrt for 60 min at 25 degrees Celsius and cooked for 6 h at Ruckfluss. The product was concentrated under reduced pressure and the THF was distilled.
Typical values of Bis methyldichlorosilyl ethane
The range of typical values of Bis methyldichloro-silyl ethane and 1-Bis methyldichloro-ethane is 1, 2, and 3 respectively. These compounds are hydrocarbon radicals with homo or hetero atom chains of one to six atoms. Among these, methyl, ethyl, propyl, butyl, pentyl, and phenyl are used.
The 4-arm star PBd was synthesized by contacting 500 mL of benzene with a linking agent, BMDCSE, and vigorous stirring. The polymer solution was monitored by constrictions during GPC characterization. After synthesis, it was stabilized with butylated hydroxytoluene. It was then poured into an excess of methanol and fractionally precipitated.
The synthesis of Bis methyldichlorosilicates is a relatively simple procedure. Polymer blends are obtained by dissolving them in toluene. Then, the polymer solution is filtered three times using nylon filters and dried under rough vacuum. The dried polymer blend films are then pressed into brass rings.
The reaction time of (III) and (VI) is extremely short, depending on the cooling performance of the reactor. Typically, the cohydrolysis process is performed in batch mode, but can be carried out continuously. Clean phase separation is advantageous for depleting residual acids, and purification of the hydrolysis product under vacuum is also possible.
Aminolysis of 1-Bis methyldichlorosilyl ethane
In an effort to understand the mechanism of the aminolysis reaction of 1-Bis methyldichlorous ethane, this study was conducted in a thermophilic system. The reaction was induced by the addition of methyldichlorsilan CH3SiHCl2 to 1,l-roundkolben. The results showed that the reaction was asymmetric. The presence of an aromatic ring, however, inhibited the process.
The authors of the study used electrospray ionization mass spectrometry to identify the intermediates in the reaction. The results revealed that aminolysis of 1,2-Bis methyldichlorosilyl ethane yields three-fold more of 4a than it does of 3a. The authors’ calculations show that the reaction time at 160 degC was largely responsible for the observed yield.
To produce oligosilazanes, chlorosilanes and oligosilazanes are added in a molar ratio of 0.1 to 1:1 or 0.4:1. At least one oligosilazane of formulae I or II is used. The reaction mixture is then heated to a temperature of 100 to 300deg C.