- Unsymmetrically substituted dimethyldiaminosilanes as ligands towards zirconium(IV)
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Unsymmetrically substituted dimethyldiaminosilanes of the general formula SiMe2(NR2) (NR′2) have been prepared by treating LiNR2 with SiMe2C1(NR′2) (NR2, NR′2 = NMe2, NC4H 8, NHiPr, NHtBu, NHCH2CH2NMe2 or NHCH2CH2-OMe). Their ligating properties towards zirconium(iv) have been investigated as a function of the nitrogen substituents and the syntheses of the binary compound Zr[SiMe2-(NiPr)(NiBu)] 2 and of the zirconium derivatives ZrX3(L) [X = Cl, NMe2; L = SiMe(NR) (NR′2), NR = NiPr, NtBu, NCH 2CH2NMe2, NCH2CH2OMe; NR′2 = NMe2, NC4H8, NHiPr, NHtBu] are also reported. The solution structures and dynamics of the compounds have been elucidated by 1D/2D multinuclear NMR spectroscopy. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004.
- Passarelli, Vincenzo,Zanella, Pierino
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- GROUP 4 METAL COMPLEX, PRODUCTION METHOD THEREOF, PREPARATION METHOD OF GROUP 4 METAL-CONTAINING THIN FILM
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PROBLEM TO BE SOLVED: To provide a group 4 metal complex having excellent thermal stability and proper vapor pressure and suitable as a material for preparing a group 4 metal-containing thin film. SOLUTION: There is provided the group 4 metal complex represented by the general formula (1), where M represents a group 4 metal atom, R1, R2, R3 and R4 each represent independently a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, R5, R6 and R7 each represent independently an alkyl group having 1 to 8 carbon atoms, R8, R9 and R10 each represent independently an alkyl group having 1 to 6 carbon atoms or a di (alkyl having 1 to 3 carbon atoms) amino group. SELECTED DRAWING: None COPYRIGHT: (C)2016,JPO&INPIT
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Paragraph 0075
(2018/10/03)
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- Complexation and Exchange Reactions of some Dimethylamino-substituted Group 4 Compounds
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Reactions of CH2(NMe2)2, (1), SiMe2(NMe2)2, (2), (cp=η-cyclopentadienyl), (3), and , (4), with covalent metal halides MCl4 (M=Ti,Zr,Si,Ge,or Sn) and MCl3 (M=Ti,V,or Cr) fall into two categories: (a) N-donor chelation leading to complex formation and (b) halide-NMe2 exchange.Compound (1) gives 1:1 complexes with MCl4 (M=Ti or Sn) and 2:1 complex with VCl3.Compound (2) provides 1:1 complexes with MCl4 (M=Ti,Zr,Hf, or Sn).The decomposition of TiCl4*SiMe2(NMe2)2 --> invariably occurs in both the solid state and solution.There is no reaction of (2) with metal(III) chlorides.With MCl4 (M=Si or Ge 'scrambling' reactions involving halide-NMe2 exchange occur and these have been monitored by 1H n.m.r. spectroscopy.Reactions of (3) and (4) with MCl4 (M=Si,Ge,Sn,Ti,Zr,or Hf) consistently feature halide-NMe2 exchange rather than adduct formation.All complexes have been characterised by analytical and spectroscopic (1H n.m.r. and i.r.) investigations.
- Wade, Steven R.,Willey, Gerald R.
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p. 1264 - 1267
(2007/10/02)
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- Chloraminosilanes II. Preparation and spectroscopic studies on alkyl-(dimethylamino)chlorosilanes
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Several new compounds containing both chloro and dimethylamino groups linked to silicon have been prepared. The general method involved reacting a solution of the appropriate polychlorosilane in ether at ca. - 50° with a chilled ethereal solution of dimethylamine. Prepared in this fashion were CH3Si(NMe2)Cl2, CH3Si(NMe2)2-Cl, PhSi(NMe2)Cl2, PhSi(NMe2)2Cl, CH3(H)Si(NMe2)Cl, (CH3)2Si(NMe2)Cl, CH2CH(CH3)Si(NMe2)Cl, and Ph2Si(NMe2)Cl. Comparison of the spectra of these compounds with those in the perhalo and peramine series showed that replacement of NMe2 for Cl resulted in an upfield shift of the resonances of the other groups linked to silicon, a shift which parallels that observed upon substitution of CH3 for Cl. The relationship of ν(SiH) in the IR and δ(SiH) in the NMR spectra was linear.
- Washburne,Peterson Jr.
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