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  • 1
    Electronic Resource
    Electronic Resource
    Segmentation of the southern Mariana back-arc spreading center (1998)
    Oxford UK : Blackwell Science Pty
    The @island arc 7 (1998), S. 0 
    Details
    ISSN: 1440-1738
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: SeaBeam multibeam bathymetry obtained during cruise SO-69 of research vessel (R/V) Sonne defines the segmentation and structure of ∼ 300 km of the Mariana back-arc spreading center south of the Pagan fracture zone at 17°33′N. Eight ridge segments, ranging from 14 to 64 km in length, are displaced as much as 2.7–14.5 km by both right- (predominantly) and left-lateral offsets and transform faults. An axial ridge commonly occupies the middle portion of the rift valley and rises from 200 to 700 m above the adjacent sea floor, in places shoaling to a water depth of 3200 m. An exception is the 60-km-long segment between 16°58′ and 17°33′N where single peaks only a few tens of meters high punctuate the rift axis. Photographic evidence and rock samples reveal the presence of mostly pillow lavas outcropping on the axial ridges or peaks whereas the deeper parts of the rift valley floor (max. depth 4900 m) are heavily to totally sedimented. Abundant talus ramps along fault scarps testify to ongoing disruption of the crust. Lozenge-shaped collapse structures are covered by layers of sediment up to tens of centimeters thick on the rift valley floor. The presence of discrete volcanic ridges in the southern Mariana back-arc spreading region suggests that emplacement of oceanic crust at this slow spreading center occurs by `multi-site' injection of magma. Along-axis variations in length, crestal depth, and size of the axial ridges can be best explained by different stages in the cyclicity of magma supply along-axis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1440-1738.1998.00207.x
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  • 2
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    The Physiological Consequences of Child-Rearing among the Creek, Chicasaw, and Choctaw (1976)
    Ottawa : Periodicals Archive Online (PAO)
    Anthropologica. n.s.:18:1 (1976) 3 
    Details
    ISSN: 0003-5459
    Topics: Ethnic Sciences
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:5100-1976-018-01-000001
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  • 3
    Electronic Resource
    Electronic Resource
    Synthesis, X-Ray Crystal Structure and Magnetic Characterization of the First “Ni3S4N3” Nickel Thiolate Cluster (1995)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 128 (1995), S. 125-129 
    Details
    ISSN: 0009-2940
    Keywords: Nickel cluster ; Nickel thiolate ; Hydrogenase ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The tridentate N,O,S-ligand (RS)-2-[(2-mercapto-1-methylamino)ethyl]phenol (rac-1) was prepared from ortho-hydroxy-chloroacetophenone in three steps. When this ligand was treated with nickel(II) acetate, the novel “Ni3S4N3” cluster rac-3 was obtained. The X-ray crystal structure of rac-3 unambiguously revealed the pseudo-C3 symmetric structure of this novel nickel cluster, which is made up by three nickel ions, one sulfide sulfur atom, and three homochiral ligand molecules, each contributing one thiolate sulfur atom and one amine nitrogen atom to the ligation of the metal ions. According to NMR-spectroscopic results, this highly symmetric structure is maintained in solution. The magnetic studies revealed diamagnetic behavior in the solid state, although antiferromagnetic interaction of the metal centers cannot absolutely be excluded.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19951280207
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  • 4
    Electronic Resource
    Electronic Resource
    Synthesis and X-ray Crystal Structure of the First Mononuclear Nickel(II) Alkane Thiolate Complex with a Mixed (S,N,N,O) Ligand FieldDedicated to Professor Rolf Gleiter on the occasion of his 60th birthday (1996)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 129 (1996), S. 1183-1189 
    Details
    ISSN: 0009-2940
    Keywords: Nickel complexes ; Thiolates ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The six-step synthesis of a chiral, pentadentate dihydrosalen ligand, carrying a mercaptomethyl group as additional binding site, is described. When this ligand was treated with nickel(II) salts, a planar tetracoordinated nickel chelate was obtained, and not the expected pentacoordinated species. This complex was fully characterized, including X-ray crystallography. The crystal structure revealed that the nickel ion is coordinated by the thiolate anion, both the amine and the imine nitrogen atoms of the ligand, and by one phenolate anion. The second phenolic oxygen atom of the ligand does not participate in the coordination of the nickel ion. This chelate is the first mononuclear nickel(II) thiolate complex having a mixed (S,N,N,O) ligand field. Cyclic voltammetry did not indicate a reduction up to -2.1 V (vs. Fc/Fc+). In the anodic range, no reversible but two irreversible oxidation processes were observed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19961291007
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  • 5
    Electronic Resource
    Electronic Resource
    Nickel(II) Complexes of Chiral Tripodal N,O,S-Ligands: Square-Planar vs. pseudo-Octahedral Coordination in the Solid State and in Solution, Metal-Induced Racemization of the Ligand (1997)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 891-897 
    Details
    ISSN: 0009-2940
    Keywords: Ligands, tridentate ; Nickel ; Thioethers ; Bioinorganic chemistry ; Racemization ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The complexation behavior of three chiral, tripodal N,O,S-ligands with nickel(II) salts was examined. It was found that the coordination mode of the ligands (bidentate N,O and N,S; tridentate N,O,S) and of the central nickel ion (square-planar vs. pseudo-octahedral) is not simply an intrinsic property of the ligand-metal combination, but also a function of the counter ions and of the solvent of crystallization. In the case of one ligand, a diamagnetic square-planar and a paramagnetic pseudo-octahedral form could be switched back and forth, by just changing the solvent of crystallization from methanol to ethanol. By using an enantiomerically pure tripodal N,O,S-ligand, a metal induced racemization was unveiled which would have otherwise remained undetected.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19971300713
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  • 6
    Electronic Resource
    Electronic Resource
    Umsetzung von Naphthalin, Anthracen und Phenanthren mit Dichlorcarben (1975)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1975 (1975), S. 201-208 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaction of Naphthalene, Anthracene and Phenanthrene with DichlorocarbeneNaphthalene (1), anthracene (4) and phenanthrene (8) are allowed to react with CCl2 by Makosza's method. 1 and 4 yield the chlorocycloheptatrienes 2a - c or 5c, and 3 or 6. Phenanthrene (8) gives the norcaradiene 9a which is cleaved to 10 or 11 under drastic conditions. On treatment with butyllithium 8 undergoes substitution to give 9b - d only.
    Notes: Naphthalin (1), Anthracen (4) und Phenanthren (8) werden mit CC12 nach der Makosza-Methode umgesetzt. Dabei ergaben 1 und 4 die Chlorcycloheptatriene 2a- c bzw. 5c sowie 3 bzw. 6. Phenanthren (8) liefert das Norcaradien 9a, das unter drastischen Bedingungen Ringöffnung zu 10 oder 11 erleidet. Mit Butyllithium tritt nur Substitution zu 9b - d ein.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.197519750203
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