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'Zirconium' in keywords Facet   Publication Year 1988  [X]
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1988[X]
1Author    Herbert Plenio, HerbertW. RoeskyRequires cookie*
 Title    Synthese achtgliedriger Metallacyclen mit einem M(NSN) 2 M-Gerüst (M = Zr, Hf) Syntheses of Eight-Membered Metallacyeles with a M(NSN) 2 M-Frame (M = Zr, Hf)  
 Abstract    The reactions of Cp.ZrCU, CpCp*ZrCh and CpCp*HfCU (Cp* = C s Me s , Cp = C S H S) with Me 3 SnNSNSnMe 3 yield the compounds Cp 2 Zr(NSN) 2 ZrCp 2 (1), CpCp*Zr(NSN) 2 ZrCpCp* (2) and CpCp*Hf(NSN) 2 HfCpCp* (3) as thermally and air-stable yellow solids. 2 and 3 exist as two different isomers with identical cyclopentadienyl-groups located on the same or on the opposite side of the metallacycle. 
  Reference    Z. Naturforsch. 43b, 1575—1578 (1988); eingegangen am 20. Juli 1988 
  Published    1988 
  Keywords    Metallacycle, Zirconium, Hafnium 
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 DEBUG INFO      
 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-1575.pdf 
 Identifier    ZNB-1988-43b-1575 
 Volume    43 
2Author    ;.M = Ti, ZrDieter Fenske, Eva Hartmann, Kurt DehnickeRequires cookie*
 Title    N,N'-Bis(trimethylsilyl)benzamidinato-Koniplexe von Titan und Zirkon. Die Kristallstrukturen von [C 6 H 5 -C(NSiMe3) 2 MCl 3 ] 2 ; M = Ti, Zr N,N'-Bis(trimethylsilyl)benzamidinato Complexes of Titanium and Zirconium. The Crystal Structures of [C 6 H 5 -C(NSiMe 3 ) 2 MCl 3 ]  
 Abstract    The N,N'-bis(trimethylsilyl)benzamidinato complexes [C 6 H 5 -C(NSiMe 3) 2 MCl 3 ] 2 (M = Ti. Zr) have been prepared by the reactions of N,N,N'-tris(trimethylsilyl)benzamidine, [C 6 H 5 — C(NSiMe 3)N(SiMe 3) 2 ] with titanium tetrachloride, and zirconium tetrachloride, respec-tively. The compounds form moisture sensitive, dark red (Ti) and white (Zr) crystals, which were characterized by crystal structure determinations. [C 6 H 5 —C(NSiMe 3) 2 TiCl 3 ] 2 : space group P2,/rc. Z = 2, 4373 observed independent reflexions, R = 0.034. Lattice dimensions (-90 °C): a — 959.0(8); b = 1196.5(8); c = 1770.9(11) pm; ß = 93.79(4)°. [C 6 H 5 -C(NSiMe 3) 2 ZrCl 3 ] 2 : space group P2,/«. Z = 2, 3160 observed independent reflexions, R = 0.031. Lattice dimensions (-90 °C): a = 971.6(7); b = 1222.2(9); c = 1792.9(10) pm; ß = 93.51(5)°. Both complexes crystallize isotypically, forming centrosymmetric dimeric molecules via chloro bridges with bond lengths of 242.0 and 253.8 pm (Ti), and of 253.7 and 264.9 pm (Zr). The metal atoms complete their distorted octahedral surroundings with two chlorine ligands and the nitrogen atoms of the chelating amidinato ligand. The N atoms of the amidinato group are in equatorial and axial positions. This accounts for the different metal-nitrogen bond lengths of 207 pm (ax) and 199 pm (eq) in the titanium compound and 219 pm (ax) and 214 pm (eq) in the zirconium complex. 
  Reference    Z. Naturforsch. 43b, 1611—1615 (1988); eingegangen am 22. Juni 1988 
  Published    1988 
  Keywords    N, N'-Bis(trimethylsilyl)benzamidinato Complexes, Titanium, Zirconium, Syntheses, IR Spectra 
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 DEBUG INFO      
 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-1611.pdf 
 Identifier    ZNB-1988-43b-1611 
 Volume    43