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  • 1985-1989  (10)
  • 1
    Electronic Resource
    Electronic Resource
    Beamline 10: A multipole wiggler beamline at SSRL (invited) : INTERNATIONAL CONFERENCE ON SYNCHROTRON RADIATION INSTRUMENTATION (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 1451-1456 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A beamline has been constructed at Stanford Synchrotron Radiation Laboratory (SSRL) whose radiation source is a multipole permanent magnet wiggler installed in a straight section of the SPEAR 3–3.5 GeV electron storage ring. The wiggler is a hybrid design that utilizes Nd–Fe alloy magnet material combined with Vanadium Permendur poles. It is approximately 2 m long and has 15 full wiggler periods. Its field is regulated by varying its gap height. It has a peak operating field, limited by the electron beam vacuum chamber vertical aperture, of 1.4 T. The beamline consists of vacuum, safety, and optical components capable of transporting photons to one hard x-ray (3–30 keV) end station, with provisions for implementing up to two additional branch lines. The existing hard x-ray branch can be focused by a Pt-coated toroidal mirror with a cutoff energy of approximately 22 keV. The experimental end station is serviced by a Hower–Brown type double crystal monochromator. The wiggler and beamline construction was completed in the fall of 1987 and was operated for a brief period for characterization and experimental use. We present design details and results of the initial characterization studies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140961
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  • 2
    Electronic Resource
    Electronic Resource
    Dithiazoliumsalze mit Halometallaten - Synthese und Struktur von 3-Diethylamino-5-phenyl-1,2,4-dithiazolium-tetrachloro-niccolat(II)Professor Lothar Kolditz zum 60. Geburtstage gewidmet (1989)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 576 (1989), S. 203-214 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Dithiazolium Salts of Halometalates - Synthesis and Structure of 3-Diethylamino-5-phenyl-1,2,4-dithiazolium-tetrachloroniccolate (II)Chlorination of NiII-coordinated 1,1-diethyl-3-benzoyl-thiourea by SOCl2 in acetonitrile yields turquoise 3-diethyl-amino-5-phenyl-1,2,4-dithiazolium-tetrachloroniccolate. Its reduction produces cis-bis-(1,1-diethyl-3-thiobenzoylthioureato)nickel(II). The mechanism of formation as well as the crystal and molecular structure of the title compound are presented.
    Notes: Die Chlorierung von an NiII innerkomplex gebundenem 1,1-Diethyl-3-benzoylthioharnstoff mittels SOCl2 führt in Acetonitril zu türkisem 3-Diethylamino-5-phenyl-1,2,4-dithiazolium-tetrachloroniccolat, aus dem durch Reduktion cis-Bis-(1,1-diethyl-3-thiobenzoyl-thioureato)nickel(II) zugänglich ist. Der Bildungsmechanismus des Dithiazoliumsalzes wird erörtert und die Kristall- und Molekülstrukturanalyse vorgestellt.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19895760123
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  • 3
    Electronic Resource
    Electronic Resource
    Die elektrochemische Reduktion von CSSe und CSe2 in Dimethylformamid: Heterocyclische 1,2-Dichalkogenolate und ihre Koordinationschemie (1987)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 544 (1987), S. 199-208 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Electrochemical Reduction of CSSe and CSe2 in Dimethylformamide: Heterocyclic 1,2-Dichalcogenolates and their Coordination ChemistryStarting from carbon diselenide or carbon selenidesulfide the electrochemical preparation (electrosynthesis) of heterocyclic dichalcogenolates C3X52- (X = Se: dsis; X = S/Se: C3SxSey2-) is outlined. The 1,2-dichalcogenolate compounds were isolated and characterized as dibenzoyl derivatives. Bis- or tris-chelates of general type Am[M(C3X5)n] (with A = Bu4N+, Ph4As+; M = ZnII, PtII, PdII, NiIII, CuIII, AuIII, InIII; X = Se, S/Se; m = 1, 2, 3; n = 2, 3, respectively) are available directly from methanolic solutions of the dibenzoylates after hydrolytic cleavage of the latter with sodium methanolate. In addition bis-chelates Bu4N[Ni(C3X5)2] (X = Se, S/Se) have been characterized by cyclovoltammetry and epr spectroscopy and compared with the corresponding all-sulfur ligand compound Bu4N[Ni(dmit)2] (X = S). Arguments are given for the fact that the allselenium ligand dsis (X = Se) yields the CuIII or NiIII chelate at once whereas with dmit using identical conditions the metal(II) compounds are formed.
    Notes: Ausgehend von Selenkohlenstoff und Selenschwefelkohlenstoff wird die elektrochemische Darstellung heterocyclischer Dichalkogenolate C3X52- (X = Se: dsis; X = S/Se: C3SxSey2-), die als Dibenzoylverbindungen isoliert und charakterisiert werden, beschrieben. Aus den mit Alkalimethanolat erhaltenen Verseifungslösungen dieser Dibenzoylverbindungen sind Metall-bis- und -tris-Chelate der heterocyclischen 1, 2-Dichalkogenolate vom Typ Am[M(C3X5)n] (A = Bu4N+, Ph4As+; M = ZnII, PtII, PdII, NiIII, CuIII, AuIII, InIII; X = Se, S/Se; m = 1, 2, 3; n = 2, 3) unmittelbar zugänglich. Cyclovoltammetrisch und mittels EPR werden die Nickel(III)-Verbindungen Bu4N[Ni(C3X5)2] (X = Se, S/Se) charakterisiert und der analogen Schwefelverbindung Bu4N[Ni(dmit)2] (X = S) gegenübergestellt. Für die bei der Chelatisierung mit dsis (X = Se) beobachtete Metall(II)-Metall(III)-Oxydation bei Kupfer und Nickel werden Argumente erörtert.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19875440121
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  • 4
    Electronic Resource
    Electronic Resource
    Kristall- und Molekülstruktur von 1,8-Dihydroxy-3,6-dithiaoctan-bis-quecksilber(II)-chlorid (1988)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 566 (1988), S. 131-136 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal and Molecular Structure of 1,8-Dihydroxy-3,6-dithiaoctan-bis-mercury(II) ChlorideThe crystal structure of 1,8-dihydroxy-3,6-dithiaoctane-bis-mercury(II) chloride has been determined by X-ray crystal structure analysis. The compound crystallizes monoclinic, space group C2/c with a = 15.311(2), b = 5.870(2), c = 17.479(2) Å, β = 102.76° and 4 formula units per unit cell. The structure was solved by heavy atom technique and refined to a final R value of R = 0.050. Mercury is digonally coordinated by an S and a Cl ligator. In consequence of weak interactions to an oxygen atom of the ligand as well as to three further Cl ions the coordination number is increased to six and a strongly distorted octahedron is formed. The crystal structure is built up from polymeric complex molecules.
    Notes: Die Kristallstruktur von 1,8-Dihydroxy-3,6-dithiaoctan-bis-quecksilber(II)-chlorid wurde mittels Röntgenkristallstrukturanalyse bestimmt. Die Verbindung kristallisiert monoklin in der Raumgruppe C2/c mit a = 15,311(2), b = 5,870(2), c = 17,479(2) Å, β = 102,76°; Z = 4. Die Struktur wurde mit Hilfe der Schweratommethode gelöst und bis zu einem R-Wert von 0,050 verfeinert. Quecksilber wird von einem S- und einem Cl-Ligator digonal koordiniert. Infolge schwacher Wechselwirkungen zu einem Sauerstoffatom des Liganden sowie zu 3 weiteren Cl-Ionen erhöht sich die Koordinationszahl unter Ausbildung eines stark verzerrten Oktaeders auf 6. Die Kristallstruktur ist aus polymeren Komplexmolekülen aufgebaut.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19885660117
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  • 5
    Electronic Resource
    Electronic Resource
    Chemie der Hauptgruppenelemente - Stand und Erwartung. Hrsg. Fritz, G.; Hoppe, R.; Issleib, K. VI, 397 S., zahlr. Abb. u. Tab., Format 17 × 24 cm. Leipzig: J. A. Barth 1985 (Nova Acta Leopoldina. NF Nr. 264/Bd. 59) Broschur 36,- M (1987)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 329 (1987), S. 216-216 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19873290209
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  • 6
    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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  • 7
    Electronic Resource
    Electronic Resource
    Zweikernverbrückende Bis-N-acylthioharnstoffe-Liganden in Trimetallamacrocyclen und Chelatpolymeren (1986)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 537 (1986), S. 133-144 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Binucleating Bis-N-acylthioureas - Ligands in Trimetallamacrocycles and Polynuclear Metal ChelatesBy symmetric linking of two bidentate N-acylthioureas two types of quadridentate bis-N-acylthioureas are available which act - after di-deprotonation - as bis-bidentate S, O ligands towards polyvalent metal ions. They can form oligomeric or polymeric, cyclic or chain chelates. With 1,1,1′,1′-tetraalkyl-3,3′-terephthaloyl-bis-thioureas (H2L) we obtained oligomeric triangulotrimetalla macrocycles Ni3L3 and Cu3L3. They contain perimetric 27-membered rings, counting the internal oxygens, or 39-membered rings with the external sulfur atoms on the other hand, i. e. equal chalcogen atoms are in cis-positions within each chelate unit around the three metal ions. The trimetallamacrocyclic structure was proved by x-ray crystal and molecular structure analysis of Ni3L3 (alkyl = Et) or EPR of the corresponding Cu3L3. Diamin-linked bis-N-acylthioureas form insoluble 1:1 polymeric chelates.
    Notes: Durch geeignete symmetrische Verknüpfung zweier bidentater N-Acylthioharnstoffunktionen sind zwei Typen quadridentater Bis-N-acylthioharnstoffe zugänglich, die gegenüber mehrwertigen Metallionen als bis-bidentate S, O-Liganden fungieren. Sie können oligomere oder polymere, zyklische oder offenkettige Chelate bilden. Mit 1,1,1′,1′-Tetraalkyl-3,3′-terephthaloyl-bis-thioharnstoffen (H2L) erhielten wir oligomere triangulare Trimetallamacrocyclen Ni3L3 und Cu3L3, die perimetrische 27-Ringe mit den internen Sauerstoffligatoren bzw. 39-Ringe mit den externen Schwefelligatoren aufweisen. In jeder Chelateinheit sind die Schwefel- bzw. Sauerstoffatome in cis-Anordnung. Die makrozyklische Struktur wurde mittels RKSA (Ni3L3; Alkyl = Et) bzw. EPR (Cu3L3; Alkyl = Et) bewiesen. Diaminverknüpfte Bis-N-acylthioharnstoffe bilden unlösliche 1:1 Polymerchelate.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19865370614
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  • 8
    Electronic Resource
    Electronic Resource
    Zur Koordinationschemie des 1,3-Dithiol-2-thion-4,5-diselenolats (dsit) - ein Vergleich mit 1,3-Dithiol-2-thion-4,5-dithiolat (dmit) (1989)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 577 (1989), S. 206-216 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Coordination Chemistry of 1,3-Dithiole-2-thione-4,5-diselenolate (dsit)  -  Comparison with 1,3-Dithiole-2-thione-4,5-dithiolate (dmit)Synthesis and properties of metal(II) and/or metal(III) bis-chelates of 1,3-dithiole-2-thione-4,5-diselenolate (dsit) of general type (Bu4N)n[M(dsit)2] (n = 2: M = Zn, Cd, Hg, Cu, Ni, Pd, Pt; n = 1: M = Ni, Au) are described. By comparison of the ir, 13C nmr, epr spectra, cyclovoltammetric data, and x-ray investigations (nickel-bis-chelates) of chelates of dsit and those of the chelates of 1,3-dithiole-2-thione-4,5-dithiolate (dmit) the consequences of selenium for sulfur substitution on position 4 and 5 of the heterocyclic ligand are discussed.
    Notes: Synthese und Eigenschaften von Metall(II)- und/oder Metall(III)-Bis-Chelaten des 1,3-Dithiol-2-thion-4,5-diselenolats (dsit) vom Typ (Bu4N)n[M(dsit)2] (n = 2: M = Zn, Cd, Hg, Cu, Ni, Pd, Pt; n = 1: M = Ni, Au) werden beschrieben. Anhand der IR-, 13C-NMR-, EPR-Spektren, Cyclovoltammogramme und röntgenographischen Untersuchungen der Nickel-Bis-Chelate werden die Auswirkungen der Substitution von Schwefel durch Selen an der 4- und 5-Position diskutiert.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19895770123
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  • 9
    Electronic Resource
    Electronic Resource
    Kristall- und Molekülstruktur eines neuartigen Trimetallamacrocyclus: cyclo-Tri[nickel-μ-[1,1,1′,1′-tetraethyl-3,3′-terephthaloyl-bis-thioureato(2-)-S,O:O′,S′]] (1989)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 578 (1989), S. 191-197 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal and Molecular Structure of a Novel Trimetallamacrocyle: cyclo-Tri[nickel-μ-[1,1,1′,1′-tetraethyl-3,3′-terephthaloyl-bis-thioureato(2-)-S,O:O′,S′]]The structure of the title compound has been determined by an X-ray structure analysis. The compound crystallizes in the triclinic space group P1 with a = 13.900, b = 15.403, c = 16.615 Å, δ = 84.01, β = 70.61, γ = 89.64° and Z = 2. The solution of the structure was performed by direct methods. The final R value was R = 0.073 for 2824 observed reflections. The molecule has a cyclic structure consisting of three molecules of the quadridentate ligand and three nickel atoms. The formed ring is a 27-membered trimetallamacrocycle. The nickel atoms form a nearly equilateral triangle with distances of 10.25 Å, 10.45 Å and 10.45 Å. The molecule is relatively planar.
    Notes: Die Struktur der Titelverbindung wurde durch Röntgenkristallstrukturanalyse bestimmt. Die Verbindung kristallisiert triklin in der Raumgruppe P1 mit den Gitterkonstanten a = 13,900, b = 15,403, c = 16,615 Å, δ = 84,01, β = 70,61, γ = 89,64° und Z = 2. Die Lösung der Struktur erfolgte mit direkten Methoden. Der abschließende R-Wert betrug R = 0,073 für 2284 beobachtete Reflexe. Das Molekül besitzt eine zyklische Struktur, bestehend aus drei Molekülen des quadridentaten Liganden und drei Nickel-Atomen. Der gebildete Ring ist ein 27gliedriger Trimetallamacrocyclus. Die Nickel-Atome bilden ein nahezu gleichseitiges Dreieck mit Abständen von 10,25 Å, 10,45 Å und 10,45 Å. Das Molekül ist relativ planar.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19895780122
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  • 10
    Electronic Resource
    Electronic Resource
    Kristall- und Molekülstruktur eines neuartigen Dimetallamacrocyclus: cyclo-Di[quecksilber-μ-[1,1,1′,1′-tetraethyl-3,3′-terephthaloyl-bis-thioureato(2-)-S:S′]] (1989)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 578 (1989), S. 198-204 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal and Molecular Structure of a Novel Dimetallamacrocycle: cyclo-Di[mercury-μ-[1,1,1′,1′-tetraethyl-3,3′-terephthaloyl-bis-thioureato(2-)-S:S′]]The structure of the title compound has been determined by an X-ray structure analysis. The compound crystallizes in the monoclinic space group P21/n with a = 13.437, b = 9.270, c = 18.791 Å, β = 100.65° and Z = 2. The solution of the structure was performed by Patterson methods. The final R value was R = 0.090 for 3089 observed reflections. The molecule has a cyclic structure consisting of two molecules of the ligand which coordinate only by the sulphur atoms and two mercury atoms. The formed ring is a 26-membered dimetallamacrocycle. The intramolecular Hg-Hg distance is 10.39 Å. The molecule has the symmetry Ci.
    Notes: Die Struktur der Titelverbindung wurde durch Röntgenkristallstruktur-analyse bestimmt. Die Verbindung kristallisiert monoklin in der Raumgruppe P21/n mit den Gitterkonstanten a = 13,437, b = 9,270, c = 18,791 Å, β = 100,65° und Z = 2. Gelöst wurde die Struktur mittels Patterson-Methoden. Der abschließende R-Wert betrug R = 0,090 für 3089 beobachtete Reflexe. Das Molekül besitzt eine zyklische Struktur, die sich aus zwei Molekülen des nur über die Schwefel-Atome koordinierenden Liganden und zwei Quecksilber-Atomen zusammensetzt. Der gebildete Ring ist ein 26gliedriger Dimetallamacrocyclus. Der intramolekulare Hg-Hg-Abstand beträgt 10,39 Å. Das Molekül besitzt die Symmetrie Ci.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19895780123
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