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  • 204-1244C; 204-1244E; 204-1245B; 204-1247B; 204-1248C; 204-1249B; 204-1249C; 204-1249F; 204-1250D; 204-1252A; Angle; Clast shape; Computer tomography (CT) MARCONI Medical MX 8000; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Event label; Joides Resolution; Leg204; North Pacific Ocean; Ocean Drilling Program; ODP; Sample code/label  (1)
  • Pentacoordinate silicon
  • Fluorosilicates, zwitterionic
Collection
Keywords
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  • 1
    Electronic Resource
    Electronic Resource
    Zur Existenz zwitterionischer λ5-(Ammonioorganyl)tetrafluorosilicate: Synthese sowie Kristall- und Molekülstruktur von Tetrafluoro(pyrrolidiniomethyl)silicat (1992)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 2015-2018 
    Details
    ISSN: 0009-2940
    Keywords: Fluorosilicates, zwitterionic ; Pentacoordinate silicon ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: On the Existence of Zwitterionic λ5-(Ammonioorganyl)tetrafluorosilicates: Synthesis and Crystal and Molecular Structure of Tetrafluoro(pyrrolidiniomethyl)silicateThe zwitterionic tetrafluoro(pyrrolidiniomethyl)silicate (6) was synthesized by the reaction of trimethoxy(pyrrolidinomethyl)silane (7) with hydrogen fluoride in ethanol/hydro-fluoric acid (yield 83%). 6 crystallizes in the space group P1/c with two crystallographically distinct molecules in the asymmetric unit. In both molecules the pentacoordinate silicon atom is surrounded by four fluorine atoms and one carbon atom, the latter being in an equatorial position. The coordination polyhedron of the silicon atoms can be described as a slightly distorted trigonal bipyramid. The zwitterionic structure was also proved for dissolved 6 (solution in CD3CN, NMR-spectroscopic studies).
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19921250907
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    Paper (German National Licenses)
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  • 2
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    (Table 1) Sample identifier, fabric and dipping angle from ODP Leg 204 samples on Hydrate Ridge, offshore Oregon (2007)
    PANGAEA
    In:  Supplement to: Abegg, Friedrich; Bohrmann, Gerhard; Freitag, Johannes; Kuhs, Werner F (2007): Fabric of gas hydrate in sediments from Hydrate Ridge - results from ODP Leg 204 samples. Geo-Marine Letters, 27, 269-277, https://doi.org/10.1007/s00367-007-0080-4
    Details
    Publication Date: 2024-01-09
    Description: Drilling on Hydrate Ridge, offshore Oregon, during ODP Leg 204 enabled us to investigate fabrics of gas hydrate samples in a wide depth range of the gas hydrate stability zone (GHSZ). X-ray computerized tomographic imaging on whole-round samples, frozen in liquid nitrogen, revealed that layered gas hydrate structures are related to variable processes occurring at different sediment depths. Shallow gas hydrates often form layers parallel or sub-parallel to bedding and also crosscut sedimentary strata and other gas hydrate layers, destroying the original depositional fabric. The dynamic processes interacting with this complicated plumbing system in this shallow environment are responsible for such highly variable gas hydrate fabrics. Gas hydrate layers deeper in the sediments are most often dipping with various angles, and are interpreted as gas hydrate precipitates filling tectonic fractures. These originally open fractures are potential candidates for free gas transportation, and might explain why free gas can rapidly emanate from below the bottom-simulating reflector through the GHSZ to the seafloor.
    Keywords: 204-1244C; 204-1244E; 204-1245B; 204-1247B; 204-1248C; 204-1249B; 204-1249C; 204-1249F; 204-1250D; 204-1252A; Angle; Clast shape; Computer tomography (CT) MARCONI Medical MX 8000; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Event label; Joides Resolution; Leg204; North Pacific Ocean; Ocean Drilling Program; ODP; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 78 data points
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    DATA PANGAEA
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