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  • Articles  (3)
  • crystal structures  (3)
  • 1990-1994  (3)
  • 1955-1959
  • 1
    ISSN: 0044-2313
    Keywords: Phosphaneiminato complexes of Nb, Mo, W ; reactions with NaF ; triphenylaminophosphonium chloride ; triphenyl-difluorophosphorane ; crystal structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Reactions of Phosphaneiminato Complexes of Niobium, Molybdenum, and Tungsten with Sodium Fluoride. The Crystal Structures of [PPh3NH2]Cl and PPh3F2[NbCl4(NPPh3)]2 reacts with excess sodium fluoride and 15-crown-5 in acetonitrile, forming the fluoro complex [Na-15-crown-5][NbF5(NPPh3)] at room temperature. In boiling acetonitrile the solvent takes part in the cleavage of the Nb—N bond of the phosphaneiminato complex, yielding [PPh3NH2]Cl. In corresponding reactions the phosphaneiminato complexes [MoCl4(NPPh3)]2 and [WCl5(NPPh3)] undergo a cleavage of the P—N bond giving PPh3F2 in a good yield. [PPh3NH2]Cl and PPh3F2 are characterized by crystal structure analyses:[PPh3NH2]Cl: Space group Pna21, Z = 4,1796 observed independent reflexions, R = 0.030. Lattice constants at -60°C: a = 1084.7, b = 961.7, c = 1536.5. The compound consists of PPh3NH2+ ions and chloride ions, which link the cations to … HNH … Cl … HNH … Cl chains.PPh3F2: Space group Pbcn, Z = 4,987 observed independent reflexions, R = 0.044. Lattice constants at 20°C: a = 611.41, b = 1664.2, c = 1436.9. This compound has a trigonal bipyramidal structure with the fluorine atoms in the axial positions.
    Notes: Die Reaktion von [NbCl4(NPPh3)]2 mit überschüssigem Natriumfluorid in Acetonitril führt in Gegenwart von 15-Krone-5 in der Kälte zu dem Fluorokomplex [Na-15-Krone-5][NbF5(NPPh3)]. In der Siedehitze findet unter Mitwirkung des Lösungsmittels Spaltung der Nb—N-Bindung des Phosphaniminatokonplexes statt, wobei [PPh3NH2]Cl gebildet wird. Entsprechende Untersuchungen mit den Phosphaniminatokomplexen [MoCl4(NPPh3)]2 und [WCl5(NPPh3)] führen unter Spaltung der P—N-Bindung zu PPh3F2, das in guter Ausbeute erhalten wird. [PPh3NH2]Cl und PPh3F2 haben wir durch Kristallstrukturanalysen charakterisiert.[PPh3NH2]Cl: Raumgruppe Pna21, Z = 4,1796 unabhängige, beobachtete Reflexe, R = 3,0%. Gitterkonstanten bei -60°C: a = 1084,7; b = 961,7; c = 1536,5 pm. Die Verbindung besteht aus PPh3NH2+-Ionen und Chloridionen, die über Wasserstoffbrückenbindungen … HNH … Cl … HNH … Cl die Kationen zu Ketten verknüpfen.PPh3F2: Raumgruppe Pbcn, Z = 4,987 unabhängige, beobachtete Reflexe, R = 4,4%. Gitterkonstanten bei 20°C: a = 611,41; b = 1664,2; c = 1436,9 pm. Die Verbindung hat eine trigonal-bipyramidale Molekülstruktur mit den Fluoratomen in den Axialpositionen.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 607 (1992), S. 177-182 
    ISSN: 0044-2313
    Keywords: Tin(IV) complexes ; syntheses ; IR-UV-VIS ; Mössbauer spectra ; crystal structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Tin(IV) Complexes with Tridentate Diacidic LigandsBy template reactions including bis(acetylacetonato)-dichloro-tin(IV) and O-aminophenol as well as o-aminothiophenol, benzoylhydrazine, and thiobenzoylhydrazine the tin chelates of tridentate diacidic ligands containing ligator atoms were prepared. To characterize the compound, IR, UV-VIS and Mössbauer spectroscopy were used. Crystal structure analyses demonstrate the existence of disturbed octahedral structures.Bis[acetylacetonbenzoylhydrazonato(2-)]tin(IV): space group P21/c, Z = 4, 2501 observed unique reflections, R = 0.045. Lattice dimensions at 20°C: a = 992.3, b = 2405.5, c = 1071.8pm, β = 116.94°.Bis[acetylacetonthiobenzoylhydrazonato(2-)] tin(IV): space group P21/c, Z = 4, 3603 observed unique reflections, R= 0.029. Lattice dimensions at 20°C: a = 1581.5, b = 947.8, c = 1644.9pm, β = 90.32°.
    Notes: Durch Template-Reaktionen von Bis(acetylacetonato)-dichloro-zinn(IV) mit o-Aminophenol, o-Aminothiophenol, Benzoylhydrazin und Thiobenzoylhydrazin wurden die Zinnchelate dreizähniger diacider Liganden mit- Ligatoratomen dargestellt. Die Charakterisierung der Substanzen erfolgte durch IR-, UV-VIS-und Mößbauer-Spektroskopie. Die Röntgenkristallstrukturanalysen erweisen das Vorliegen verzerrt-oktaedrischer Strukturen.Bis[acetylacetonthiobenzoylhydrazonato(2-)] zinn(IV): Raumgruppe P21/c, Z = 4, 2501 beobachtete unabhängige Reflexe, R = 4,5%. Gitterabmessungen bei 20°C: a = 992, 3; b = 2405,5; c = 1071, 8pm, β=116,94°.Bis[acetylacetonbenzoylhydrazonato(2-)] zinn(IV): Raumgruppe P21/c, Z = 4, 3603 beobachtete unabhängige Reflexe, R = 2,9%. Gitterabmessungen bei 20°C: a = 1581, 5; b = 947,8; c = 1644,9pm, β=90,32°.
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  • 3
    ISSN: 0044-2313
    Keywords: Vanadium Complexes ; syntheses ; EPR spec-tra, absorption spectra ; crystal structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Vanadium Complexes with Tridentate Diacidic Ligands. The Crystal Structures of Bis[acetylacetonato-thiobenzoylhydrazonato(2-)]vanadium(IV), Methoxo-oxo-[salicylaldehyd-thiobenzoylhydrazonato(2-)]vanadium(V), and Methoxo-oxo-[salicylaldehydbenzoylhydrazonato(2-)]methanol Vanadium(V)By template reactions of bis(acetylacetonato)oxovanadium(IV) and bis(salicylaldehydato)oxo-vanadium(IV), respectively, with benzoylhydrazine, thiobenzoylhydrazine, and 2-aminophenol the vanadium(IV) complexes V(LLL)2 of tridentate azomethine ligands LLL were synthesized. The complexes were characterized by EPR spectroscopy and by absorption spectroscopy. From the complex V(LLL)2 (1), in which LLL is acetyl-aceton-thiobenzoydrazonate(2-), the crystal structure analysis was solved. The vanadium atom in 1 is coordinated trigonal-prismatically by two N, 0 and S atoms. Furthermore, the 0x0 vanadium(V) complexes[VO(LLL)(OCH,)] (6) with LLL = salicylaldehyd-thio-benzoylhydrazonato(2-) and [VO(LLL)(OCH3)· -CH3OH] (7) with LLL = salicylaldehydbenzoylhydrazonato(2-) were identified by X-ray diffraction and by IR spectroscopy in the reaction products.Crystallographic data for 1, 6, and 7 see „Inhaltsübersicht“.
    Notes: Durch template-Reaktionen von Bis(acetylacetonato)-oxovanadium(IV) bzw. Bis(salicylaldehydato)-oxovanadium(IV) mit Benzoylhydrazin, Thiobenzoylhydrazin und 2-Aminophenol wurden die Vanadium(IV)-komplexe V(LLL)2 mit den dreizähnigen diaciden Azomethinliganden LLL synthetisiert. Die Komplexe werden durch ihre EPR-Spektren und durch die Absorptionsspektren charakterisiert; von dem Komplex V(LLL)2 (1) mit LLL = acetylaceton-thiobenzoylhydrazonato(2-) wurde eine Kristallstrukturanalyse angefertigt. Danach ist das Vanadiumatom trigonal-prismatisch von je zwei S-, O- und N-Atomen des Liganden LLL umgeben. In den Reaktionsprodukten wurden daneben röntgenstrukturanalytisch und IR-spektroskopisch die Oxovanadium(V)-komplexe [VO(LLL)(OCH3)] (6) mit LLL = salicylaldehyd-thiobenzoylhydrazonato(2-) und [VO(LLL)(OCH3)] · CH3OH (7) mit LLL = salicylaldehydbenzoylhydrazonato(2-) identifiziert.1: Raumgruppe P21/c, Z = 4, 1205 beobachtete unabhängige Reflexe, R = 4,8%. Gitterabmessungen bei 20°C: a = 923,1(2); b = 1156,2(2); c = 2341,3(5) pm; β = 101,30(3).6: Raumgruppe P21/n, Z = 4, 1872 beobachtete unabhängige Reflexe, R = 4,4%. Gitterabmessungen bei 20°C: a = 742,2(1); b = 1148,0(1); c = 1787,8(2) pm, β = 96,48(1)°. Das Vanadiumatom in 6 ist verzerrt tetragonal-pyramidal koordiniert mit dem Oxoliganden in Apical-Position.7: Raumgruppe P21/c, Z = 4, 992 beobachtete unabhängige Reflexe, R = 5,9%. Gitterabmessungen bei 20°C: a = 816,6(2); b = 1698,6(3), c = 1224,1(2) pm; β = 104,20(3)°. Das Vanadiumatom in 7 ist verzerrt oktaedrisch koordiniert mit dem O-Atom des Methanol-Moleküls in trans-Stellung zum Oxoliganden.
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