Preparation, properties and applications of oligomeric and polymeric organosilanes

Manifestations of Conformational Defects in Electronic Spectra of Polysilanes – a Theoretical Study

“…The uniqueness of these compounds lies predominantly in their electronic and thus optical properties that originate in electron delocalization along the chain which is made of silicon (Si) atoms connected by single bonds . The delocalization or σ‐conjugation is explained by overlapping of the lobes of sp 3 hybridized silicone σ‐orbitals of the particular or adjacent Si atoms (also called vicinal and germinal orbitals) as was reported elsewhere . Hence, absorption spectra of polysilanes have become indispensable knowledge and still investigated topic in the area of polymers and have been described, for instance, by or UV‐vis spectra of polysilanes‐containing composites by .…”

“…[1,2] The delocalization or s-conjugation is explained by overlapping of the lobes of sp 3 hybridized silicone s-orbitals of the particular or adjacent Si atoms (also called vicinal and germinal orbitals) as was reported else-where. [3,4,5] Hence, absorption spectra of polysilanes have become indispensable knowledge and still investigated topic in the area of polymers and have been described, for instance, by [3,6,7] or UV-vis spectra of polysilanes-containing composites by. [8] The longest wavelength absorption around 300-350 nm is assigned to s!s à transition on Si-Si bond and it is known that the position of this absorption peak shifts with different side groups attached to the main chain.…”

Force field parameters for aminoorganosilanes

“…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).…”

“…They are valuable source materials for the silicon nitride synthesis and allow access to high performance silicon based ceramics [1,2]. Furthermore, organosilanes play an important role as building blocks for multifunctional polysilanes [3] and crosslinked silazane polymers [4].…”

Hexamethyldisilane

“…1 In organic chemistry it is often used as an alternative of chlorotrimethylsilane or hexamethyldisilazane silylating agents. Hexamethyldisilane also promotes reduction and can act as a co-catalyst.…”