ORGANO-METALLIC AND ORGANO-METALLOIDAL HIGH TEMPERATURE LUBRICANTS AND RELATED MATERIALS. Progress Report for December 15, 1957 to March 31, 1958
In extension of earlier studies concerned with organic compounds containing one or more hydrogen atoms attached to silicon, it was shown that the reaction of an alkyl SiH/sub 3/ compound with an alkyl MgX compound in tetrahydrofuran yields an alkyl/sub 2/SiH/sub 2/ type. This in turn with an RMgX type like allyhnagnesium chloride gives (in tetrahydrofuran) the R/sub 3/SiH compound. From this, by means of an RLi compound, one can obtain the R/sub 4/Si type. Previously it appeared that the formation of completely unsymmetrical R/ sub 4/Si typos was more restricted to Si-H/sub 3/ and SiH/sub 2/ compounds having aryl groups attached to the silicon. incidental to the synthesis of a wide variety of organic compounds containing the SiH/sub 3/ or SiH/sub 2/ or SiH groupings, some correlations between such structures and infrared spectra have been developed. Also, some novel high-temperature reactions of the silicon- hydrogen types are presented. A significant extension to the preparation of ''custom-made'' molecules is the normal reaction of some P/sub 3/SiM types with compounds like aliphatic ketones and aldehydes. These hydroxy- containing compounds are relatively resistant to rearrangement to the Si-0-R structures. It was observed that some compounds containtng the silicon-nitrogen structure have greater hydrolytic stability than might have been predicted. A wide variety of Si-N types is being prepared to establish, among other things, the scope and limitations of their thermal and their hydrolytic stabilities. Two interesting reactions might be mentioned in connection with some organosilicon compounds containiag ntrogen. One of these is a product of reaction of acridine with P/sub 3/SiM types to give a so-called built-in anti-oxidant. Another is the attachment of the 2pyridyl and of the 4-pyridyl group to silicon. The 4- (triphenylsilyl)pyridine has a promising thermal stabillty. incidental to the preparation of new organosilicon types, appropriate solvents for effecting cleavage reactions with various metals were examined. At this stage it appears that one of the more satisfactony solvents is tetrahydropyran. The cleavage of pbenylated Group V-B elements should provide a means of prepariag not only Si-N types, but also related compounds. (For preceding period see NP-6331.) (auth)
- Research Organization:
- Iowa State Coll., Ames
- DOE Contract Number:
- AF33(616)-3510
- NSA Number:
- NSA-12-008988
- OSTI ID:
- 4330347
- Report Number(s):
- NP-6669
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-58
- Country of Publication:
- United States
- Language:
- English
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