New cyclic and spirocyclic aminosilanes
| Autor: | Betty Günther, Edwin Kroke, Jörg Wagler, Henrik Scholz, Sandra Schwarzer, Marcus Herbig, Lia Gevorgyan, Daniela Gerlach, Uwe Böhme |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Spiro compound 010405 organic chemistry Chemistry Metals and Alloys Silazane General Chemistry spiro compound 010402 general chemistry Condensed Matter Physics 01 natural sciences 0104 chemical sciences chemistry.chemical_compound silazane aminosilane Materials Chemistry Organic chemistry QD1-999 spirocyclic |
| Zdroj: | Main Group Metal Chemistry, Vol 44, Iss 1, Pp 51-72 (2021) |
| ISSN: | 2191-0219 0792-1241 |
| DOI: | 10.1515/mgmc-2021-0007 |
| Popis: | New cyclic and spirocyclic aminosilanes were synthesised using ethylenediamine, 2-aminobenzylamine, 1,8-diaminonaphthalene, o-phenylenediamine, andtrans-cyclohexane-1,2-diamine as starting material. These diamines were converted into aminosilanes using silicon tetrachloride and dimethyldichlorosilane directly and via theN,N’-bis(trimethylsilylated) amino derivatives. 15 new compounds of the type (diamino)(SiMe3)2, (diamino)2Si, (diamino)SiMe2, and (diamino)SiCl2have been prepared. The formation of two cyclotrisilazane derivatives was observed starting from (N,N’-2-aminobenzylamino)dichlorosilane by trimerisation. All synthesised compounds have been characterised with NMR-, Raman-, or IR-spectroscopy, mass-spectrometry, and boiling or melting point. Single-crystal X-ray structure analyses of several derivatives have been performed.The degree of substitution with trimethylsilyl groups in the final compounds depends on the ring size of the spirocycles. It was shown with quantum chemical calculations on the M062X/6-31G(d) level that trimethylsilyl groups have a stabilising effect on 5-membered ring systems and a destabilising effect on 6-membered rings in these compounds. |
| Databáze: | OpenAIRE |
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