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  • Cyclooctatetraenyl complexes  (2)
  • Benzyl compound  (1)
  • Cyclopentadienylgold(I) complexes  (1)
  • Diazadiene ligands  (1)
  • 1
    ISSN: 1434-4475
    Keywords: Organoyttrium compounds ; X-ray structural analysis ; Cyclooctatetraenyl complexes ; Cyclopentadienyl complexes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The reaction of (C8H8)YCl(THF) with NaC5H4CH3 in tetrahydrofuran leads to (C8H8)Y(C5H4CH3)(THF). The X-ray structural analysis shows the compound to be orthorhombic witha=1157.5 (2),b=1553.2 (5),c=1718.9 (6) pm, space group Pbca,Z=8, andD (calcd)=1.48 g/cm−3. The structure was solved from 1643 observed reflections withF o⩾4σ (F o) and refined to a finalR factor of 0.058. The expected sandwich structure is bent according to the ring centroid-Y-ring centroid angle of 149° caused by theTHF molecule coordinated to Y.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 123 (1990), S. 2279-2285 
    ISSN: 0009-2940
    Keywords: Metallocenes ; Envelope structure ; Ring inversion ; Titanium complexes ; Zirconium complexes ; Diazadiene ligands ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Titanocene- and Zirconocene(diazadiene) Complexes: Preparation, Characterization, and StructureBy treating Cp2MCl2 (M = Ti, Zr) with magnesium in the presence of the diazadienes R1N = CR2CR2 = NR1 (R1 = R2 = Ph:1a; R1 = Ph, R2 = Me: 1b) metallocene complexes of formula Cp2) (M = Ti: 2a, b; M = Zr: 3a, b) have been obtained in good yields. 2a-3b exhibit dynamic NMR spectra indicating a rapid intramolecular migration of the bent metallocene unit Cp2M from one “face” of the reduced diazadiene to the other. From the 1H-NMR Cp-coalescence ΔG
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 1035-1039 
    ISSN: 0009-2940
    Keywords: Titanium complex ; Diazadiene ligand ; Envelope structure ; Benzyl compound ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Diazadiene Complexes of Electron-Deficient Transition Metals: Synthesis, Properties, and Structure of CpTi(diazadiene)ClThe electron-deficient 1,4-diazadiene (DAD) complex CpTi-(DAD)Cl (3), [DAD=1],4-bis(4-methoxyphenyl)-2,3-dimethyl-1,4-diazabutadiene] is prepared either by reduction of CpTiCl3 (1) with magnesium in the presence of free DAD (2) or by the reaction of 1 with Na2DAD. NMR spectroscopic and X-ray diffraction analysis of 3 indicate that the bonding of the DAD ligand has σ2,π-metallacyclopentene rather than η4;-π character. As a result of steric repulsion between the Cp ring and methyl groups of the DAD ligand 3 exhibits a supine (exo) geometry for DAD coordination is solid state. Substitution reaction of 3 affords the novel complex CpTi(DAD)R (R=CH2Ph).
    Additional Material: 2 Ill.
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  • 4
    ISSN: 0009-2940
    Keywords: Cyclopentadienyl complexes ; Cyclooctatetraenyl complexes ; Yttrium compounds ; Terbium compounds ; Lutetium compounds ; Lanthanoides, organo-, alkoxides ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Organometallic Compounds of the Lanthanoids, 73[1]. - Synthesis and Structure of New Monocyclooctatetraenyl Complexes of Yttrium, Terbium, and Lutetium[(C8H8)Ln(μ1-Cl)(THF)]2 (Ln=Y, Lu) react with NaOR (R=Ph, C6H3Me2-2,6) to give the dinuclear cyclooctatetraenyl rare earth alkoxides [(C8H8)Ln(μ1-OR)(THF)]2 [R=Ph, Ln=Y (1a), Lu (1b); R=C6H3Me2-2,6, Ln=Y (2a), Lu (2b)]. The reactions of [(C8H8)Ln(μ1-Cl)(THF)]2 with LiOC(tBu)3, NaOSiPh3, and NaC5H3tBu2 result in the formation of (C8H8)LnOC(tBu)3(THF) [Ln=Y (3a), Lu (3b)], (C8H8)LnOSiPh3(THF) [Ln=Y (4a), Lu (4b)], and (C8H8)Tb(C5H3tBu2) (5), respectively. Treatment of (C8H8)Y(C5Me5) with acetylacetone yields (C5Me5)Y(acac)2 (6). The 1H-and 13C-NMR and mass spectra of the new compounds as well as the X-ray crystal structures of 1a and 5 are discussed.
    Additional Material: 2 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 122 (1989), S. 1423-1426 
    ISSN: 0009-2940
    Keywords: Cyclopentadienylgold(I) complexes ; Pentabenzylcyclopentadienyl metal complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Pentabenzylcyclopentadienyl(triphenylphosphine)gold(I)Pentabenzylcyclopentadienyl(triphenylphosphine)gold(I) was prepared by the reaction of chloro(triphenylphosphine)gold(I) with pentabenzylcyclopentadienyllithium and characterized by NMR spectroscopy and X-ray structural analysis. The molecule shows a linearly coordinated gold with a σ-bonded cyclopentadienyl ring with a “slip distortion”, typical for cyclopentadienylgold(I) compounds. Three of the five benzyl ligands are directed towards the metal.
    Notes: Pentabenzylcyclopentadienyl(triphenylphosphan)gold(I) wurde durch Reaktion von Chloro(triphenylphosphan)gold(I) mit Pentabenzylcyclopentadienyllithium erhalten und durch NMR-Spektroskopie und Röntgenstrukturanalyse charakterisiert. Das Molekül zeigt ein linear koordiniertes Gold-Atom, wobei der σ-gebundene Cyclopentadienyl-Ring die für Cyclopentadieylgold(I)-Verbindungen typische „slip distortion“ aufweist. Von den fünf Benzyl-Gruppen sind drei zum Metallatom hin gerichtet.
    Additional Material: 3 Ill.
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