- Structure, properties and comparison of c,n-chelated and amido-stabilized plumbylenes
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The molecular structure of {2-[(CH3)2NCH2]C6H4}2Pb (1) in the solid state was determined by X-ray diffraction techniques on a single crystalline material. Bulky amido ligand stabilized complexes [(i-C3H7)2C6H3]NHLi (2) and [(i-C3H7)2C6H3N(Me3Si)]2Pb (3) w
- BareS, Josef,Sourek, Vitizslav,Padelkova, Zdenka,Meunier, Philippe,Pirio, Nadine,Cisarova, Ivana,Ruzicka, Ales,Holecek, Jaroslav
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- Arylaminosilane Compound, Propylene Polymerization Catalyst And Preparation Thereof
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The present disclosure discloses an arylaminosilane compound, a propylene polymerization catalyst and preparation thereof. The arylaminosilane compound has a structure of wherein R1 is a C1-C8 alkyl group or a C1/sub
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Paragraph 0107; 0108
(2020/12/08)
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- Stoichiometric Reactions of CO2 and Indium-Silylamides and Catalytic Synthesis of Ureas
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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.
- Xu, Maotong,Jupp, Andrew R.,Stephan, Douglas W.
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supporting information
p. 14277 - 14281
(2017/10/31)
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- Synthesis of mono-, di-, and triaminobismuthanes and observation of C-C coupling of aromatic systems with bismuth(iii) chloride
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The reaction of lithium N-trimethylsilyl-amides of the type RN(SiMe3)Li with bismuth(iii) chloride yielded mono-, di- or triaminobismuthanes depending on the sterical demand of the anilide ligand R and the used stoichiometry. For the bulky Mes? substituent the reaction with BiCl3 resulted in the formation of a C-C coupling product as the main product besides a small amount of the expected Mes?N(SiMe3)BiCl2.
- Hering-Junghans, Christian,Schulz, Axel,Thomas, Max,Villinger, Alexander
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supporting information
p. 6053 - 6059
(2016/04/26)
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- Aryl(silyl)amino group stabilized hydridosilanediols: Synthesis and characterization and use for preparation of alumino(hydrido)siloxanes
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Aryl(silyl)amino group stabilized hydridosilanediols RSiH(OH)2 (R = N(SiMe2Ph)-2,6-iPr2C6H3 (4), N(SiMe3)-2,6-iPr2C6H3 (5), and N(SiMe2Ph)-2,4,6-Me3C6H2 (6)) were prepared from the controlled hydrolysis of the related RSiHCl2 (1-3) each in the presence of aniline as the HCl acceptor. Reactions of 4 with AlMe3, AliBu3, AlH(iBu)2, and AlH3·NMe3, respectively, yielded alumino(hydrido)siloxanes [2,6-iPr2C6H3N(SiMe2Ph)Si(H)OAlMe(THF)]2 (7), [2,6-iPr2C6H3N(SiMe2Ph)Si(H)OAliBu(THF)]2 (9), [2,6-iPr2C6H3N(SiMe2Ph)Si(H)O2]3[Al(THF)]2 (10), and [2,6-iPr2C6H3N(SiMe2Ph)Si(H)OAlH(THF)]2 (11). The reaction of 5 with AlMe3 gave [2,6-iPr2C6H3N(SiMe3)Si(H)OAlMe(THF)]2 (8), a compound similar to 7. Compounds 1-11 are characterized by NMR (1H, 13C, and 29Si) and IR spectroscopy and CHN elemental analysis, of which 6 and 8-11 are further studied by X-ray crystallography. Compounds 8-9 and 11 feature cyclic structures all with the skeleton core of Si2O4Al2 while compound 10 exhibits a bicyclic structure having a core of Si3O6Al2. Melting point measurements indicated that 4-6 are thermally stable bearing the geminal SiH and SiOH groups. Compounds 8-9 and 11 are thermally stable as well with the O atom-bridged SiH and AlR (R = Me, iBu, or H) groups.
- Wang, Xiaoping,Li, Jiancheng,Chen, Shimin,Liu, Weiping,Ye, Qingsong,Zhu, Hongping
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p. 6709 - 6717
(2016/05/09)
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- Synthesis of 1,3-dichloro- cyclo -1,3-diphosphadiazanes from silylated amino(dichloro)phosphanes
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The synthesis of 1,3-dichloro-cyclo-1,3-diphosphadiazanes [ClP(μ-NR)]2 via elimination of Me3SiCl from silylated amino(dichloro)phosphanes, R-N(SiMe3)PCl2, was studied by different synthetic protocols starting from R-N(H)SiMe3 (R = Si(SiMe3)3 = Hyp, N(SiMe3)2, Mes* = 2,4,6-tri-tert-butylphenyl, Ter = 2,4-bis(2,4,6-trimethylphenyl) phenyl, Dipp = 2,6-diisopropylphenyl, Dmp =2,6-dimethylphenyl, Ad = Adamantyl, Trityl = Ph3C, Tos = tosyl = CH3C6H 4SO2, n-Oct = n-octyl, and Me3Si). A new synthetic route using trimethylsilyl-substituted amino(dichloro)phosphanes, R-N(SiMe3)PCl2, was developed to form cyclo-diphosph(III)- azanes simply by adding a mixture of RfOH/base (RfOH = hexafluoroisopropanole). By this method electron-rich/-poor aryl-, silyl-, and bissilylamino-substituted cyclo-diphosph(III)-azanes are accessible such as the unprecedented (Me3Si)2N-substituted species [ClP(μ-NN(SiMe3)2)]2 starting from tris(trimethylsilyl)hydrazine and PCl3. Additionally, the difficulties with the preparation of cyclo-diphosphadiazanes depending on the starting materials, solvents, and bases due to the competition of different reaction channels are studied.
- Schulz, Axel,Villinger, Alexander,Westenkirchner, Andrea
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supporting information
p. 11457 - 11468
(2013/10/22)
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- Synthesis and reactivity of a conveniently prepared two-coordinate bis(amido) nickel(ii) complex
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A strictly two-coordinate nickel(ii) bis(amido) complex has been prepared and its reactivity towards a variety of small molecules is described. Ni[N(SiMe3)(DIPP)]2 reacts with DMAP and acetonitrile to form T-shaped three-coordinate complexes, and preliminary results show that Ni[N(SiMe3)(DIPP)]2 is a catalyst for the hydrosilation of olefins with secondary silanes at ambient temperature.
- Lipschutz, Michael I.,Tilley, T. Don
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supporting information; experimental part
p. 7146 - 7148
(2012/08/08)
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- N-bonded monosilanols: Synthesis and characterization of ArN(SiMe 3) SiMe2Cl and ArN(SiMe3)SiMe2OH (Ar = C6H5, 2,6-Me2C6H3, 2,6-iPr2C6H3)
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By the use of aniline and the sterically hindered aromatic primary amines, 2,6-Me2C6H3NH2 and 2,6-iPr 2C6H3NH2, N-bonded monochlorosilanes, ArN(SiMe3)SiMe2Cl [Ar = C 6H5 (1a), Ar = 2,6-Me2C6H 3 (1b) and Ar = 2,6-iPr2C6H3 (1c)] have been prepared by a sequential deprotonation at the nitrogen followed by reaction with silyl chlorides. Hydrolysis of the N-bonded monochlorosilanes afforded the N-bonded monosilanols ArN(SiMe3)SiMe2OH [Ar = C6H5 (2a), Ar = 2,6-Me2C6H 3 (2b) and Ar = 2,6-iPr2C6H3 (2c)]. The X-ray crystal structure of le reveals a positional disorder of the Cl and CH3 substituents on silicon. The X-ray crystal structure of 2c shows that it is involved in an intermolecular O-H...O hydrogen bonding in the solid state to afford a dimeric structure containing the O2H 2 ring. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005.
- Chandrasekhar, Vadapalli,Boomishankar, Ramamoorthy,Azhakar, Ramachandran,Gopal, Kandasamy,Steiner, Alexander,Zacchini, Stefano
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p. 1880 - 1885
(2007/10/03)
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