13435-10-4

Upstream product

• 75-77-4 chloro-trimethyl-silane 
• 95-54-5 1,2-diamino-benzene 

Downstream Products

• 18848-98-1 2-chloro-2,2'-dicyclohexyl-1'-trimethylsilanyl-2,3,2',3'-tetrahydro-1'H-[1,2']bi[benzo[1,3,2]diazasilolyl] 
• 139041-49-9 C₆H₄(NWCl₄)2 
• 250148-79-9 [Mo(=NPh)(μ-NPh)(o-(Me3SiN)2C6H4)]2 
• 250148-90-4 Mo(=NPh)2(CH₂CMe₃)2 
• 250148-91-5 Mo(=NPh)2(CH₂SiMe₃)2 
• 615-16-7 1,3-dihydro-2H-benzimidazol-2-one 
• 845869-75-2 Zr[(para-CH₃C₆H₄)NN(SiMe₃)NNC₆H₄NSiMe₃][ortho-(Me₃SiN)2C₆H₄] 
• 211125-02-9 (C₆H₄N₂)(PC₆H₅)3C₆H₄(NH)2 
• 212907-38-5 C₂₄H₁₉Cl₂N₂P₃ 
• 114050-56-5 (C₆H₄N₂(C₆H₅P)2)2 

Relevant academic research and scientific papers

Synthesis, characterization, and X-ray crystal structures of W(VI) alkyl complexes with chelating diamide and imido co-ligands

The complex W(NPh)Cl2[o-(NSiMe3)2C6H4] 3 was synthesized from PhN=WCl4·OEt2 and N,N′-(Li2[o-(NSiMe3)2C6H4] and reacts with Lewis bases to form the adducts W(NPh)Cl2[o-(NSiMe3)2C6H4](L) (L = PMe3, THF, 3-picoline, tBuNC, MeCN) 4a-e. Crystals of 4a are triclinic, space group P1, with a = 9.562(1), b = 10.277(1), c = 14.920(2) A, α = 82.15(1), β = 80.18(1), γ = 80.41(1)°, and Z = 2. The structure was solved by the heavy atom method and refined to R = 0.0408 for 4224 observed (I > 2σ(I)) reflections. The dialkyl complexes W(NPh)R2[o-(NSiMe3)2C6H4] (R = Me, Et, CH2Ph, CH2CMe3, CH2CMe2Ph) 5-9 are formed through subsequent reactions of 3 with the corresponding Grignard reagent. Crystals of complex 5 are monoclinic, space group P2(1)/n, with a = 10.3545(2), b = 17.9669(1), c = 13.3168(1) A, β = 103.826(1)°, and Z = 4. The structure of complex 5 was solved by direct methods in SHELXTL5 and refined to R = 0.0247 for 4572 observed reflections. Compound 5 has a square pyramidal geometry in which the imido ligand occupies the apical position and reacts with PMe3 to form the adduct W(NPh)Me2[o-(NSiMe3)2C6H4](PMe3) 5a. Crystals of complex 5a are monoclinic, space group C2/m, with a = 13.5336(1), b = 14.4291(1), c = 15.3785(1) A, β = 110.365(1)°, and Z = 4. The structure of compound 5a was solved by direct methods in SHELXTL5 and refined to R = 0.0272 for 3057 observed reflections. Crystals of the bis-neopentyl complex 8 are monoclinic, space group P2(1)/n, with a= 10.6992(4), b= 18.3144(7), c = 16.0726(6) A, β = 92.042(1)°, and Z = 4. The structure of 8 was solved by direct methods in SHELXTL5 and refined to R = 0.0261 for 5881 observed reflections. Complex 8 has a trigonal bipyramidal geometry with both neopentyl groups and one amido nitrogen in the equatorial plane.

New cyclic and spirocyclic aminosilanes

New cyclic and spirocyclic aminosilanes were synthesised using ethylenediamine, 2-aminoben-zylamine, 1,8-diaminonaphthalene, o-phenylenediamine, and trans-cyclohexane-1,2-diamine as starting material. These diamines were converted into aminosilanes using

"DIBUTYLMAGNESIUM", A CONVENIENT REAGENT FOR THE SYNTHESIS OF USEFUL ORGANIC MAGNESIUM REAGENTS MgA2 INCLUDING CYCLOPENTADIENYLS, ARYLOXIDES, AND AMIDES. PREPARATION OF Zr(C5H5)Cl3. X-RAY STRUCTURE OF (SiMe3)-o>(OEt2)>2

n-Heptane-soluble "di-butylmagnesium" (I) (a commercially available material, prepared by addition of LiBus to MgBunCl, and subsequent addition of ca, 5percent MgOctn2) has been found to be a useful starting material for o

Formation of Aromatic O-Silylcarbamates from Aminosilanes and Their Subsequent Thermal Decomposition with Formation of Isocyanates

A novel phosgene-free route to different isocyanates starts from CO2 and aminosilanes (cf. silylamines) to form so-called carbamoyloxysilanes (O-silylcarbamates), i. e., compounds with the general motif R1R2N?CO?O?SiR3R4R5 as potential precursors. We focused on the insertion reaction of CO2 into Si?N bonds of substrates with cyclic (mostly aromatic) amine substituents, i. e., PhNHSiMe3, (PhNH)2SiMe2, PhCH2NHSiMe3, p-(MeO)C6H4NHSiMe3, o-C6H4(NHSiMe3)2, 1,2-C6H10(NHSiMe3)2, o-C6H4(NHSiMe3)(CH2NHSiMe3) and 1,8-C10H6(NHSiMe3)2. Compared to previously investigated aminosilanes these reactions are hindered due to the reduced nucleophilicity/basicity of the N-atoms. Whereas slightly increased CO2 pressure (8 bar) and prolonged reaction times (24 h) were sufficient to overcome hindrance of the insertion into, e. g., PhNHSiMe3, intermolecular effects in some two-fold NHSiMe3 functionalized substrates led to partial mono-insertion (e. g., into o-C6H4(NHSiMe3)(CH2NHSiMe3)) or intra-molecular condensation of the intermediate insertion product in case of 1,8-C10H6(NHSiMe3)2 to form 1H-perimidin-2(3H)-one and other side products. Thermal treatment of mono-silylated O-silylcarbamates RHN?CO?O?SiR’3 resulted mainly in the formation of substituted ureas (RHN)2CO, whereas desired isocyanates could not be detected in these cases. Therefore, we continued our studies focussing on N,O-bissilylated precursors, which were obtained by an additional N-silylation of the O-silylated carbamates. This allowed the successful formation of isocyanates. As a sole byproduct hexamethyldisiloxane is formed. In all cases, known as well as yet unknown substances were characterised by 1H, 13C and 29Si NMR spectroscopy, along with X-ray diffraction analysis for crystallized solids.

Stoichiometric Reactions of CO2 and Indium-Silylamides and Catalytic Synthesis of Ureas

The indium compounds In(N(SiMe3)2)2Cl?THF (2) and In(N(SiMe3)2)Cl2?(THF)n (3) were shown to react with CO2 to give [(Me3Si)2N)InX(μ-OSiMe3)]2 (X=N(SiMe3)2 4, Cl 5). 0.05–2.0 mol % of the species 3 acts as a pre-catalyst for the conversion of aryl and alkyl silylamines under CO2 (2–3 atm) to give the corresponding ureas in 70–99 % yields. A proposed mechanism is supported by experimental and computational data.

Synthesis and application of some dianilinosilanes, bis (trimethylsilyl) phenylenediamines and dialkyl benzo-1,3,2-diazasilolines as antioxidants

A number of dialkyl or diphenyl dianilinosilanes, bis (trimethylsilyl) phenylenediamines and dialkyl benzo-1,3,2-diazasilolines were synthesized and used as antioxidants for lubricating base oils. Thermal analysis methods (DSC, TG and DTG) and IR techniqu