C4H9NOSi Trimethylsilyl isocyanate

2005 ◽  
pp. 1-1
Author(s):  
G. Graner ◽  
E. Hirota ◽  
T. Iijima ◽  
K. Kuchitsu ◽  
D. A. Ramsay ◽  
...  
Keyword(s):  
Trimethylsilyl Isocyanate

scholarly journals Supersize Cp! Tetrabenzo[a,c,g,i]fluorenyl complexes of yttrium

2017 ◽  
Vol 95 (4) ◽  
pp. 363-370 ◽  
Author(s):  
Jianlong Sun ◽  
David J. Berg ◽  
Brendan Twamley
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Ethylene Polymerization ◽  
Nmr Studies ◽  
X Ray ◽  
X Ray Crystallography ◽  
Trinuclear Cluster ◽  
Polymerization Catalyst ◽  
Dynamic Nuclear Magnetic Resonance ◽  
Trimethylsilyl Isocyanate

The synthesis of tetrabenzo[a,c,g,i]fluorenyl (Tbf) yttrium dialkyl complexes, (Tbf)Y(CH2SiMe3)2(L) (L = tetrahydrofuran (THF), 1; L = bipy, 2), by direct protonolysis of the tris(alkyl) complex, Y(CH2SiMe3)3(THF)2, are reported. The X-ray crystal structures of 1 and 2 display the helical twisting typically observed for the Tbf ligand. Dynamic nuclear magnetic resonance (NMR) studies on 1 show a barrier to Tbf helical inversion (epimerization or “wagging”) of 38.1 ± 0.5 kJ mol−1. The reaction of 1 with acidic hydrocarbons such as 1,3-bis(trimethylsilyl)cyclopentadiene or trimethylsilylacetylene results in protonolysis to form the mixed Cp derivative [(Tbf){C5H3(SiMe3)2}Y(CH2SiMe3)(THF)] (3) or [(Tbf)Y(CCSiMe3)2(THF)]n (4), respectively. In the case of 4, a small amount of the trinuclear cluster (Tbf)Y3(μ3-CCSiMe3)2(μ2-CCSiMe3)3(CCSiMe3)3(THF)2 (5) was isolated and characterized by X-ray crystallography. Dialkyl 1 undergoes smooth insertion of trimethylsilyl isocyanate to afford [(Tbf)Y{κ2-(N,O)-Me3SiN(Me3SiCH2)CO}2(THF)] (6) but it does not react with alkenes. Treating 1 with [Ph3C]+[B(C6F5)4]− in bromobenzene generates a moderately active ethylene polymerization catalyst (36 kg mol−1 h−1 bar−1).

The Synthesis of Some Pyrimidinyl and Thiazolyl Ureas and Thioureas and Some Related Compounds

1988 ◽  
Vol 41 (8) ◽  
pp. 1221 ◽  
Author(s):  
DT Hurst ◽  
AD Stacey ◽  
M Nethercleft ◽  
A Rahim ◽  
MR Harnden
Keyword(s):  
Urea Derivative ◽  
Benzoyl Isothiocyanate ◽  
Trimethylsilyl Isocyanate ◽  
Related Compounds

Some pyrimidin-2- and pyrimidin-4-amines were treated with isocyanates and isothiocyanates to give the corresponding disubstituted ureas or thioureas . A pyrimidin-2-amine is more reactive than a pyrimidin-4- amine in these reactions. 2-Aminothiazoles and thiazolinones also react to give the disubstituted ureas or thioureas . The use of ethoxycarbonyl or benzoyl isothiocyanate or isocyanate gives products which are readily hydrolysed to the pyrimidinyl or thiazolyureas or thioureas but with concomitant hydrolysis and decarboxylation of an ethoxycarbonyl substituent . The use of chlorosulfonyl or trimethylsilyl isocyanate gives the urea derivative without isolation of the intermediate disubstituted urea. Some related compounds were also synthesized.

Xenon difluoride–trimethylsilyl isocyanate–triflic acid as a new system for the amination of aromatic compounds

2001 ◽  
Vol 11 (5) ◽  
pp. 172-173 ◽  
Author(s):  
Namig Sh. Pirkuliev ◽  
Valery K. Brel ◽  
Novruz G. Akhmedov ◽  
Nikolai S. Zefirov ◽  
Peter J. Stang
Keyword(s):  
Aromatic Compounds ◽  
Xenon Difluoride ◽  
Triflic Acid ◽  
Trimethylsilyl Isocyanate ◽  
New System

Crystal and molecular structure of trimethylsilyl isocyanate

1990 ◽  
Vol 30 (5) ◽  
pp. 853-856
Author(s):  
A. I. Gusev ◽  
E. B. Chuklanova ◽  
A. S. Zhdanov ◽  
E. V. Muzovskaya ◽  
Vik P. Kozyukov
Keyword(s):  
Molecular Structure ◽  
Crystal And Molecular Structure ◽  
Trimethylsilyl Isocyanate

ChemInform Abstract: Xenon Difluoride-Trimethylsilyl Isocyanate-Triflic Acid as a New System for the Amination of Aromatic Compounds.

ChemInform ◽  
2010 ◽  
Vol 33 (11) ◽  
pp. no-no
Author(s):  
Namig Sh. Pirkuliev ◽  
Valery K. Brel ◽  
Novruz G. Akhmedov ◽  
Nikolai S. Zefirov ◽  
Peter J. Stang
Keyword(s):  
Aromatic Compounds ◽  
Xenon Difluoride ◽  
Triflic Acid ◽  
Trimethylsilyl Isocyanate ◽  
New System

scholarly journals Preparation of nanostructured porous SiO2-Al2O3 oxycarbonitride materials obtained by a new chemical precursor method

2009 ◽  
Vol 7 (1) ◽  
pp. 42-46 ◽  
Author(s):  
Yordanka Ivanova ◽  
Tsvetelina Gerganova ◽  
M. Fernandes ◽  
Isabel Salvado
Keyword(s):  
Nanostructured Materials ◽  
Hybrid Materials ◽  
Sol Gel ◽  
Nitrogen Atmosphere ◽  
Hybrid Networks ◽  
29Si Mas Nmr ◽  
Precursor Method ◽  
Silica Source ◽  
Porous Sio2 ◽  
Trimethylsilyl Isocyanate

AbstractNanostructured hybrid materials containing Al2O3 were synthesized via a sol-gel method through hydrolysis and co-condensation reactions using trimethylsilyl isocyanate (TMSI) as a new silica source in the presence of tetramethoxysilane (TMOS) and three different quantities (10, 20 and 30 wt.%) of aluminum sec-butoxide (Al(OBusec)3 as a modifying agent. The xerogel nanostructured materials are pyrolyzed in nitrogen atmosphere in the temperature range from 400°C to 1100°C. The transformation of the xerogel hybrid networks into Al-Si oxycarbonitride materials has been investigated by XRD, FTIR, SEM, AFM, and 29Si MAS-NMR. To the best of our knowledge, the work reported here is the first synthesis of porous di-urethanesils modified with aluminum and one of the few examples of alumosilica oxycarbonitride materials

Interaction of trimethylsilyl isocyanate with xenon difluoride and fluoroxenonium triflate in the presence of alkenes

2001 ◽  
Vol 11 (5) ◽  
pp. 171-172 ◽  
Author(s):  
Namig Sh. Pirkuliev ◽  
Valery K. Brel ◽  
Novruz G. Akhmedov ◽  
Nikolai S. Zefirova ◽  
Peter J. Stang
Keyword(s):  
Xenon Difluoride ◽  
Trimethylsilyl Isocyanate
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