Category: 312-40-3

Cragg, R. Harry published the artcileContributions to Group IV organometallic chemistry. VII. The effect of electronegativity on substituent shifts in silicon-29 NMR, Synthetic Route of 312-40-3, the publication is Journal of Organometallic Chemistry (1984), 277(2), 199-201, database is CAplus.

Silicon-29 NMR shifts for silanes Me_2-nPh_nSiX₂ (X = H, Me, Ph, F, Cl, NR₂, OR; R = Me, Et, CHMe₂, Ph) indicate that the shifts on replacement of a Me by a Ph group are largely determined by the electronegativity and donor ability of X.

Journal of Organometallic Chemistry published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C12H10F2Si, Synthetic Route of 312-40-3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Ishikawa, Nobuo published the artcilePreparation and properties of alkali metal dialkyl(or -aryl)tetrafluorosilicates, Recommanded Product: Difluorodiphenylsilane, the publication is Nippon Kagaku Zasshi (1968), 89(7), 699-702, database is CAplus.

PhSiCl2(C6H4-Me-p), b6 152-4¡ã, was prepared from p-MeC6H4MgBr and PhSiCl3 in 60% yield. RR’SiCl2 was converted to RR’SiF2 (I) by heating with Na2SiF6. Thus, PhSiF2(C6H4Me-p), b11 130.5-1.5¡ã, was prepared in 70% yield. I and MF (where M is an alkali metal) in tetrahydrofuran, Me2CO, or MeCN stirred for 20 hrs. at room temperature gave alkali dialkyltetrafluorosilicate. Thus, K2[Ph2SiF4], Na2[Ph2SiF4], Cs2[Ph2SiF4], K2[MePhSiF4], Na2-[MePhSiF4], Cs2[MePhSiF4] and Cs2[Me2SiF4] were prepared These compounds are all hygroscopic substances, possess ir absorptions at approx. 1530 and approx. 1260 cm.-1 and decompose to R2SiF2 and MF on standing in the air. Thus, these complexes cannot be prepared in aqueous solution The rate of formation of C6H6 from Ph2SiF2 and PrNH3F or PhNH3F was measured and found to be faster with PrNH3F. The results are interpreted by assuming that complex formation is the rate-determining step and is dependent on the concentration of F-.

Nippon Kagaku Zasshi published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C12H10F2Si, Recommanded Product: Difluorodiphenylsilane.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Ishikawa, Nobuo published the artcileOrganic fluorine silicon compounds. VI. Preparation and reactions of functional diorganofluorosilanes, HPLC of Formula: 312-40-3, the publication is Kogyo Kagaku Zasshi (1969), 72(12), 2602-5, database is CAplus.

Ph2SiF2 (I) (0.1 mole) and 0.1 mole Ph2SiCl2 or (EtO)2SiPh2 was heated at 180-90¡ã C in the presence of 0.002 mole AlCl3 to give Ph2SiClF (II) and EtOSiFPh2 (III): for II, ¦¤G-(460¡ãK) = -0.26 kcal/mole K(460¡ãK) = 1.33; for III, the values were -2.65, 18.1. II was also formed (30%) by partial chlorination of I with AlCl3 in ether. Diorganochlorofluoro-silanes reacted with alkylamines, alcs. (phenol), and water to give diorganoalkylaminofluorosilanes, diorganoalkoxyfluoro-silanes, and 1,1,3,3-tetraorgano-1,3-difluorosiloxanes, resp. in 70-95% yields. The following RR1SiXF were prepared (R, R1, X, and b.p./mm given): Ph, Ph, NHPr, 130-5¡ã/3; Ph, Ph, morpholino(Z), 142-6¡ã/3; Ph, Me, NHPr, 63-6¡ã/3; Ph, Me, Z, 95-100¡ã/5; Ph, Ph, OEt, 110-13¡ã/3; Ph, Ph, OPr, 101-3¡ã/3; Ph, Ph, OBu, 109-13¡ã/2; Ph, Ph, OPh, 133-7¡ã/2; Ph, Me, OEt, 75-7¡ã/14; Ph, Me, OPr, 55-6¡ã/3; Ph, Me, OBu, 66-7¡ã/3; and Ph, Me, OPh, 98-100¡ã/3; The following RR1SiFOSiFRR1 were also prepared (R, R1, and b.p./mm given): Ph, Ph, 194-6¡ã/-3; and Ph, Me, 95-100¡ã/2. II and III were hydrolyzed to octaorganocyclotetrasiloxanes in the presence of alkylamines. NMR and ir spectral data were given.

Kogyo Kagaku Zasshi published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C12H10F2Si, HPLC of Formula: 312-40-3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Ehm, Christian published the artcileHow a Thermally Unstable Metal Hydrido Complex Can Yield High Catalytic Activity Even at Elevated Temperatures, Computed Properties of 312-40-3, the publication is Chemistry – A European Journal (2016), 22(27), 9305-9310, database is CAplus and MEDLINE.

Despite their instability in ethereal solvents, organotitanium hydride catalysts are successfully employed in catalysis at moderate to high temperatures (110 ¡ãC), even in the presence of alcs. It is shown computationally (bond dissociation energy (BDE) anal. and energetic profile for regeneration) and exptl. (EPR studies and kinetic studies), with the specific example of hydrodefluorination (HDF), that despite the long standing belief, regeneration of Ti-H bonds from Ti-F bonds using silanes is endergonic. The resulting low concentration of Ti-H species is crucial for the catalytic stability of those systems. The resting state in the catalysis is a Ti-F species. The most promising silanes for regeneration are not the ones that have the strongest Si-F bond, but the ones that show the largest difference in Si-F and Si-H BDEs.

Chemistry – A European Journal published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C12H10F2Si, Computed Properties of 312-40-3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Enthaler, Stephan published the artcileLow-Temperature Depolymerization of Polysiloxanes with Iron Catalysis, Recommanded Product: Difluorodiphenylsilane, the publication is ChemSusChem (2014), 7(7), 2030-2036, database is CAplus and MEDLINE.

The easy accessibility and high adjustability of polymers mainly accounts for the great impact of such materials on modern society. Besides this great success, an important matter is the accumulation of large amounts of end-of-life polymers, which are mainly deposited in landfills or converted by thermal recycling or down-cycling to low-quality materials. In contrast to that, the depolymerization of end-of-life polymers to monomers, which can be applied as feedstock in polymerization chem. for high-quality polymers, is only carried out for a small fraction of waste. Polysiloxanes are extensively used in a diverse array of technol. applications. Based on intrinsic properties of polymers, depolymerization is challenging and only a few high-temperature or less environment-friendly processes have been reported. In this regard, we have set up a capable low-temperature protocol for the depolymerization of poly(dimethylsiloxane) in the presence of catalytic amounts of simple iron salts in combination with different depolymerization reagents. The application of benzoyl fluoride, benzoyl chloride/potassium fluoride, or benzoic anhydride/potassium fluoride as depolymerization reagents affords difluorodimethylsilane or 1,3-difluoro-1,1,3,3-tetramethyldisilxanes as products, which are interesting building blocks for the synthesis of new polymers and allow an overall recycling of polysiloxanes.

ChemSusChem published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C12H10F2Si, Recommanded Product: Difluorodiphenylsilane.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Drozdov, V. A. published the artcileAcid-base properties of alkyl(aryl)fluorosilanes in nonaqueous media, Computed Properties of 312-40-3, the publication is Zhurnal Obshchei Khimii (1970), 40(1), 104-9, database is CAplus.

Conventional syntheses gave the following: Me2EtSiF, b. 51¡ã, d20 -, n20D – (n15D 1.3570); Me2PrSiF, b. 77¡ã, -, 1.3708; Me2PhSiF, b. 155-7¡ã, -, 1.5471; (PhCH2)SiMe2F, b98 104¡ã, 0.9743, 1.4838; MeEt(PhCH2)SiF, b. 200-2¡ã, 0.9663, 1.4792; MePh(PhCH2)SiF, b. 117¡ã, 1.0610, 1.5481; MePh2SiF, b43 164.5¡ã, 1.077, 1.5482; Et3SiF, b. 109-10¡ã, 0.8392, 1.3906; Et2PhSiF, b8 77-8¡ã, 0.9837, 1.4880; Et2(PhCH2)SiF, b95 96¡ã, 0.9828, 1.4942; PhSiFCl2, b. 157-9¡ã, -, 1.5293; Ph2SiFCl, b10 131-2¡ã, -, 1.5471; MePhSiF2, b4 108-10¡ã, 1.2000, 1.5339; PhSiF2Cl, b. 129-30¡ã, -, 1.4575; PhSiF3, b. 102-3¡ã, 1.2270, 1.4106; and PhSiCl3, b100 225¡ã, 1.2220, 1.5821; also: MePh2SiCl, b45 191¡ã; MePhSiCl2, b100 223-5¡ã; MePh(PhCH2)SiCl, b. 149¡ã; Me2PhSiCl, b. 190-1¡ã; and Et2PhSiCl, b9 100-2¡ã. Ir spectral curves of 12 of these were shown and their thermodynamic acidity was determined by potentiometric titration in dry MeOH and EtOH relative to dry HCl in the same solvents. The relative values of such acidity expressed in units of pK (-SiR3) were, in MeOH and EtOH, resp.: Et3SiF, 10.9, 10.0; MeEt(PhCH2)-SiF 10.2, 9.56; Me2PhSiF 9.55, 9.14; MePh(PhCH2)SiF, 9.29, 8.80; and Me3SiF, 10.43, 9.69. Unlike chlorosilanes, the sub-stituent groups had considerable effect on the acidity of the fluorosilanes. This is ascribed to the low polarizability of these.

Zhurnal Obshchei Khimii published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C12H10F2Si, Computed Properties of 312-40-3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Lelikova, V. E. published the artcileDonor-acceptor properties of organosilicon compounds. III. Binary systems of aprotic solvents with some alkyl(aryl)fluoro-, methylphenyldichloro-, tetraethoxy-, and trimethylphenylsilanes, SDS of cas: 312-40-3, the publication is Zhurnal Obshchei Khimii (1973), 43(6), 1300-4, database is CAplus.

The property-composition curves for the binary systems of solvents, e.g., OP(NMe2)3, Me2NAc, Me2SO, MeNO2, PhNO2, PhF, AcPh, and pyridine, with MeSiPhCl2, Si(OEt)4, Me3SiPh, Ph2SiF2, PhSiF3, Et3SiF, and MeSiPhF2 were determined The plots of variation of nd and d. showed that interaction took place only in cases in which a SiF bond existed, or in which MeSiPhCl2 was a component. The acceptor ability of fluorosilanes decreased in the order: PhSiF3, Ph2SiF2, MeSiPhF2, Et3SiF. MeSiPhCl2 was superior to its difluoro analog with respect to donor-acceptor reactions.

Zhurnal Obshchei Khimii published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C12H10F2Si, SDS of cas: 312-40-3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Walter, Simone published the artcileSynthesis of unsymmetrical trisilylamines with rotational barriers, Formula: C12H10F2Si, the publication is Zeitschrift fuer Naturforschung, B: Chemical Sciences (1991), 46(9), 1149-60, database is CAplus.

Bis- and tris(fluorosilyl)amines with bulky groups are prepared in the reaction of lithiated di-tert-butylfluorosilylamine with fluorosilanes. Tris(fluorosilyl)amines with 3 different silyl groups could be synthesized stepwise in these reactions. In all tris(fluorosilyl)amines a rotational barrier is observed by NMR spectroscopy at room temperature The compounds (Me₃C)₂SiFN(SiFRR¹) (R = R¹ = Me; R = F, R¹ = CMe) and (Me₃C)₂SiFN(SiFR₂)SiF₂R¹ [I; R = CMe₃, R¹ = CMe₃, Ph (II)] show only one structural isomer, whereas the compounds I [R = CMe₃, R¹ = F (III); R = CHMe₂, R¹ = Ph; R = Ph, R¹ = Me] show 2 structural isomers. The crystal structures of II and III were determined

Zeitschrift fuer Naturforschung, B: Chemical Sciences published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C9H17NO, Formula: C12H10F2Si.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Enterling, Detlev published the artcileSubstitution and ring coupling in the cyclotrisilazane system, Formula: C12H10F2Si, the publication is Zeitschrift fuer Naturforschung, Teil B: Anorganische Chemie, Organische Chemie (1978), 33B(5), 527-32, database is CAplus.

Fluorosilanes, chlorodiorganylboranes and chlorotrimethylstannane react with lithiated cyclotrisilazanes with LiF elimination and substitution. Thus, reaction of I with F₃SiCHMeEt gave 85% II. Mixed substituted compounds are obtained by the reaction of lithiofluorosilylcyclotrisilazanes with other fluorosilanes. Reaction of I with 2-chloro-1,3,4,5,6-pentamethylborazine gave III. The reaction of IV with BuLi gave V.

Zeitschrift fuer Naturforschung, Teil B: Anorganische Chemie, Organische Chemie published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C12H10F2Si, Formula: C12H10F2Si.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Lee, Kang-sang published the artcileMonodentate Non-C₂-symmetric Chiral N-Heterocyclic Carbene Complexes for Enantioselective Synthesis. Cu-Catalyzed Conjugate Additions of Aryl- and Alkenylsilylfluorides to Cyclic Enones, Recommanded Product: Difluorodiphenylsilane, the publication is Journal of Organic Chemistry (2009), 74(12), 4455-4462, database is CAplus and MEDLINE.

A new class of enantioselective conjugate addition (ECA) reactions that involve aryl- or alkenylsilyl fluoride reagents and are catalyzed by chiral non-C₂-sym. Cu-based N-heterocyclic carbene (NHC) complexes are disclosed. Transformations were designed based on the principle that a catalytically active chiral NHC-Cu-aryl or NHC-Cu-alkenyl complex can be accessed from reaction of a Cu-halide precursor with in situ-generated aryl- or alkenyltetrafluorosilicate. Reactions proceed in the presence of 1.5 equiv of the aryl- or alkenylsilane reagents and 1.5 equiv of tris(dimethylamino)sulfonium difluorotrimethylsilicate (TASF). Desired products are isolated in 63-97% yield and 73.5:26.5-98.5:1.5 enantiomeric ratio (47%-97% ee). A major focus of the present studies is the design, evaluation, and development of new chiral imidazolinium salts and their derived NHC-Cu complexes as catalysts that promote reactions of various carbosilanes to a range of electrophilic substrates. Toward this end, nearly 20 new chiral monodentate imidazolinium salts, most of which are non-C₂-sym., were prepared and fully characterized and their ability to serve as catalysts in the ECA reactions was studied.

Journal of Organic Chemistry published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C12H10F2Si, Recommanded Product: Difluorodiphenylsilane.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia