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  • 1
    Electronic Resource
    Electronic Resource
    77Se-NMR-Untersuchungen an Bis-Chelaten heterocyclischer 1,2-DichalkogenolateProfessor Eberhard Hoyer zum 60. Geburtstage am 26. Mai 1991 gewidmet (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 600 (1991), S. 89-93 
    Details
    ISSN: 0044-2313
    Keywords: 77Se.n.m.r. ; coordination compounds ; unsaturated selenium ligands ; relaxation times T1 ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 77Se-NMR-Investigations of Bis-Chelates with Heterocyclic 1,2-Dichalcogenolates77Se-n.m.r. chemical shifts of metal(II)- and metal(III)-bis-chelates of 1,3-diselenole-2-selone-4,5-diselenolate (dsis), 1,3-dithiole-2-selone-4,5-diselenolate (dsise), 1,3-dithiole-2-selone-4,5-dithiolate (dmise) and 1,3-dithiole-2-thione-4,5-diselenolate (dsit) and relaxation times T1 (spain-lattice relaxation time) of the Se nucleus of (Bu4N)2[Zn(dsit)2], (Bu4N)2[Zn(dmise)2] and (Bu4N)2[Zn(dsise)2] are reported. Comparisons are made between 77Se-n.m.r. chemical shifts and the nature of coordination centre and coordination geometry.
    Notes: 77Se-NMR-Untersuchungen77Se-NMR-chemische Verschiebungen von Metall(II)- und Metall(III)-Bis-Chelaten des 1,3-Diselenol-2-selon-4,5-diselenolats (dsis), 1,3-Dithiol-2-selon-4,5-diselenolats (dsise), 1,3-Dithiol-2-selon-4,5-dithiolats (dmise) und 1,3-Dithiol-2-thion-4,5-diselenolats (dsit) sowie Spin-Gitter Relaxationszeiten T1 der Se-Atome in den Chelaten (Bu4N)2[Zn(dsit)2], (Bu4N)2[Zn(dmise)2] und (Bu4N)2[Zn(dsise)2] werden mitgeteilt und Zusammenhänge zwischen der Lage der 77Se-Resonanzsignale und der Art des Koordinationszentrums, der Oxidationszahl des Zentralions und der Koordinationsgeometrie diskutiert.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19916000113
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  • 2
    Electronic Resource
    Electronic Resource
    Synthese und Charakterisierung von Metallocen-Chelaten heterocyclischer 1,2-DiselenolateProfessor Eberhard Hoyer zum 65. Geburtstag gewidmet (1996)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 1979-1986 
    Details
    ISSN: 0044-2313
    Keywords: Metallocene-diselenolates ; DNMR ; EPR ; X-Ray ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Characterization of Metallocene Chelates of Heterocyclic 1,2-DiselenolatesSynthesis and properties of metallocen diselenolates Cp2RML (CpR = η5-C5H4CH3 (Cp′); η5-C5(CH3)4 C2H5 (Cpo)) of titanium(IV) and vanadium(IV) with L = dsit (1,3-dithiole-2-thione-4,5-diselenolate), dsise (1,3-dithiole-2-selone-4,5-diselenolate) dsitse (1,3-thiaselenole-2-selone-4,5-diselenolate) and dsis (1,3-diselenole-2-selone-4,5-diselenolate) are described. The structures of these compounds in solution are discussed using 1H, 13C, 77Se NMR and EPR data. Their voltammetric behaviour is investigated in dichloromethane. The activation parameters of the chelate ring inversion of the titanocene diselenolates (Cp2RTiL) and the x-ray structures of Cp2′Ti(dsit), Cp2oTi(dsit); Cp2oTi(dsise) (2 modifications) and Cp2oTi(dsis) are reported.
    Notes: Synthese und Eigenschaften neuer Metallocen-Diselenolate CpR2ML (CpR = η5-C5H4CH3 (Cp′); η5C5(CH3)4C2H5 (Cpo)) des Titan(IV) und Vanadium(IV) mit L = dsit(1,3-Dithiol-2-thion-4,5-diselenolat), dsise (1,3-Dithiol-2-selon-4,5-diselenolat) dsitse (1,3-Thiaselenol-2-selon-4,5-diselenolat) und dsis (1,3-Diselenol-2-selon-4,5-diselenolat) und dsis (1,3-Diselenol-2-selon-4,5-diselenolat) werden beschrieben. Die Strukturen der Verbindungen in Lösung werden anhand der 1H-, 13C-, 77Se-NMR- und EPR-Spektren sowie ihres Redoxverhaltens diskutiert. Die durch dynamische Kernresonanzspektroskopie bestimmten Aktivierungsparameter der Chelatringinversion der Titanocen-Diselenolate (CpR2TiL), sowie die Röntgenkristallstrukturanalysen von Cp′2Ti(dsit), Cp2oTi(dsit); Cp2oTi(dsise) (2 Modifikationen) und Cp2oTi(dsise) werden vorgestellt.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19966221128
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  • 3
    Electronic Resource
    Electronic Resource
    ERP-Untersuchungen an Oxovanadium(IV)-Bis-Komplexen mit 1,2-Dithioliganden (1987)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 548 (1987), S. 133-140 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: EPR Studies on Oxovanadium(IV) Bis-Complexes of 1,2-Dithio LigandsEPR investigations on oxovanadium(IV) bis-complexes containing the ligands 1,3-dithiol-2-thione-4,5-dithiolate, dmit2-, 1,2-dithiol-3-thione-4,5-dithiolate, dmt2-, and 1,2-dithiooxalate are reported. The parameters of the spin-Hamiltonian are used to characterize the bonding properties, and are compared with those obtained for the corresponding VOS4 chelates containing four-membered chelate rings. According to this a successful characterization of VOS4 type mixed-ligand complexes should be possible.
    Notes: Über EPR-Untersuchungen an Oxovanadium(IV)-bis-Komplexen der Liganden 1,3-Dithiol-2-thion-4,5-dithiolat, dmit2-, 1,2-Dithiol-3-thion-4,5-dithiolat, dmt2-, und 1,2-Dithiooxalat wird berichtet. Die erhaltenen Parameter des Spin-HAMILTON-Operators werden zur Charakterisierung der Bindungsverhältnisse benutzt und mit den für relevante VOS4-Vierringchelate erhaltenen verglichen. Der Parametervergleich eröffnet Möglichkeiten zur erfolgreichen Charakterisierung von Gemischtliganden-Komplexen, die eine VOS4-Koordinationssphäre enthalten.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19875480515
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    Paper (German National Licenses)
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