Crystalline Aminoorganosilanes – Syntheses, Structures, Spectroscopic Properties

Abstract

A number of aminosilanes derived from N-methylaniline and chloroorganylsilanes were prepared and characterized. X-ray structure analysis was performed on the crystalline derivatives Ph(Cl)Si(NMePh) 2 (4a), HSi(NMePh) 3 (2b), MeSi(NMePh) 3 (3b), and Ph 2 Si(NMePh) 2 (6b). The compounds were comprehensively charac-* Dr. U. Böhme 1607 terized by 1 H, 13 C, 29 Si NMR, and IR spectroscopy. Volatile derivatives were further characterized by GC/MS. It was shown using quantum chemical methods that the planarization of the nitrogen atoms in the amino derivatives is caused by phenyl groups and silyl substituents.

Syntheses and Molecular Structures of Liquid Pyrophoric Hydridosilanes

“…Chlorosilanes are versatile building blocks for the preparation of numerous silicon compounds. [39][40][41][42][43][44] Highly pure hexachlorodisilane is prepared in an industrial scale. [45,46] It is used for gas phase epitaxy of silicon at low temperatures.…”

Lactamomethylsilanes – Synthesis, Structures, and Reactivity towards CO2 and Phenylisocyanate

“…The Si–N bond lengths are between 1.742(2) to 1.745(2) Å. This is in the range for typical Si–N bond lengths . The Si–C bond is 1.834(3) Å.…”

“…Many aminosilanes were synthesized via this route in nonpolar solvents like n ‐hexane or n ‐pentane , . The used lactams as well as the synthesized lactamomethylsilanes are not soluble in these solvents.…”

Force field parameters for aminoorganosilanes

“…Crystalline aminoorganosilanes are accessible by reaction of chloroorganosilanes with secondary amines with flat aromatic substituents as we have learned from the successful synthesis of crystalline N-methylanilinoorganosilanes [7]. Another organylamine which should suit the requirements as substituent for obtaining crystalline aminoorganosilanes is dibenzylamine.…”

“…The following 14 X-ray structures were used for the evaluation in Table 3: (Si(MeNPh) 2 Me) 2 [16]; Me(PhNMe) 2 Si-SiCl(MeNPh)Me [16]; (SiCl(MeNPh)Me) 2 [16]; (Si(NEt 2 ) 2 t-Bu) 2 [17]; (Si(NEt 2 )2the-xyl) 2 [17]; Si 2 Cl 4 (N(i-Pr) 2 ) 2 [18]; Si 2 Ph 4 (NEt 2 ) 2 [19]; Si 2 (NMe 2 ) 6 [20]; SiPhCl(N(CH 2 Ph) 2 ) 2 [21]; SiPhCl(NMePh) 2 [7]; (NEt 2 ) 2 PhSiSiPh(NEt 2 ) 2 [22]; SiH(NMePh) 3 [7]; MeCl(Bz 2 N)Si-Si(NBz 2 )ClMe (3) (two crystallographic independent molecules).…”