312-40-3Relevant articles and documents
Isolable Silicon-Based Polycations with Lewis Superacidity
Hermannsdorfer, André,Driess, Matthias
, p. 23132 - 23136 (2020)
Molecular silicon polycations of the types R2Si2+ and RSi3+ (R=H, organic groups) are elusive Lewis superacids and currently unknown in the condensed phase. Here, we report the synthesis of a series of isolable terpyridine-stabilized R2Si2+ and RSi3+ complexes, [R2Si(terpy)]2+ (R=Ph 12+; R2=C12H8 22+, (CH2)3 32+) and [RSi(terpy)]3+ (R=Ph 43+, cyclohexyl 53+, m-xylyl 63+), in form of their triflate salts. The stabilization of the latter is achieved through higher coordination and to the expense of reduced fluoride-ion affinities, but a significant level of Lewis superacidity is nonetheless retained as verified by theory and experiment. The complexes activate C(sp3)?F bonds, as showcased by stoichiometric fluoride abstraction from 1-fluoroadamantane (AdF) and the catalytic hydrodefluorination of AdF. The formation of the crystalline adducts [2(F)]+ and [5(H)]2+ documents in particular the high reactivity towards fluoride and hydride donors.
Unusual reaction of trifluorophenylsilane with dimethyl sulfoxide
Basenko,Boyarkina,Gavrilova,Voronkov
, p. 315 - 315 (2001)
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Synthesis method of diphenyl difluorosilane
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Paragraph 0013-0023, (2020/11/23)
The invention discloses a synthesis method of diphenyl difluorosilane, belonging to the technical field of additives for battery electrolytes. The synthesis method comprises the following steps: withphenyldiethoxysilane as a raw material, adding phenyldiethoxysilane into a dry container; carrying out heating to 80-100 DEG C, and adding sodium trichloropyridinol and ethanol while stirring; then dropwise adding chlorobenzene into a mixture obtained in the previous step; after dropwise adding is finished, carrying out a reflux reaction for 3-8 hours, and conducting cooling to 30-35 DEG C; carrying out reduced-pressure suction filtration, adding sodium tetrafluoroborate into a filtrate, performing heating to 180-220 DEG C, and carrying out reacting for 4-6 hours; then conducting cooling to room temperature, performing diluting with dichloromethane, conducting quenching with water, and separating out an organic layer; and carrying out drying, carrying out vacuum concentration, and carryingout reduced-pressure distillation to obtain diphenyl difluorosilane. The synthesis method is simple, raw materials are cheap and easily available, reaction is stable, yield is high, and purity is high.
Synthesis of Double-Decker Silsesquioxanes from Substituted Difluorosilane
Tanaka, Toru,Hasegawa, Yasuharu,Kawamori, Takashi,Kunthom, Rungthip,Takeda, Nobuhiro,Unno, Masafumi
supporting information, p. 743 - 747 (2019/03/04)
A novel synthetic method for the construction of a double-decker silsesquioxane from fluorosilanes was developed. Phenyl-substituted double-decker silsesquioxane was prepared under mild conditions by coupling difluorodiphenylsilane and a tetrasiloxanolate precursor. A similar reaction was performed using difluorovinylsilane, and a divinyl double-decker silsesquioxane was obtained. The one-step reaction of a functional difluorosilane containing an aminopropyl group afforded a novel double-decker silsesquioxane with two amino groups complexed with BF3, which can react with carboxylic acid anhydrides to afford an amide product. This synthetic method using difluorosilane is tolerant of a wide range of functional groups and is applicable to the synthesis of polycyclic silsesquioxanes bearing amino groups, which are difficult to directly obtain from dichlorosilane.
