ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 68-502; 68-502A; 68-502B; 68-502C; 68-503A; 68-503B; Caribbean Sea/RIDGE; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg68; North Pacific/FLANK  (1)
  • Analytical Chemistry and Spectroscopy  (1)
Collection
Keywords
Publisher
Years
  • 1
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The mass spectral fragmentation patterns of some diarylmethylene-bis-xanthates have been investigated and are compared with those for the 1,1,α,α-dibenzyl-thioacetals 1,1-diphenylmethane. The formation of a sulphenium cation is characteristic for the bis-xanthates. Their subsequent fragmentation is similar to that of thioesters. Also noteworthy is the appearance of ions having thio-ketone-like structures, except in the case of 1,1,α,α-diphenyl thioacetal 1,1-diphenylmethane. This is compared with the pyrolytic behaviour. The intensity of various metastable decompositions leading to the [benzophenone]+. ion in the first field free region depends mostly on the excess thermal energy.
    Notes: Das massenspektrometrische Verhalten der Diarylmethylen-bis-xanthogenate wird beschrieben und mit dem der Dithioacetale verglichen. Charakteristisch für alle untersuchten Verbindungen ist das Auftreten eines primär gebildeten Sulfenium-Kations, das für die Verbindungen ein den Thioestern analoges Fragmentierungsverhalten zeigt. Hervorzuheben ist das mit Thioketonstrukturen, deren Bildung mit der thermolytischen verglichen und diskutiert wird. Dabei ist bemerkenswert, dass die als Beleg dienenden metastabilen Signale für die Bildung des Fragments d aus dem 1. feldfreien Raum erst bei höheren Temperaturen auftreten und somit Abhängigkeit von der thermischen Überschussenergie zeigen.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    facet.materialart.
    Unknown
    PANGAEA
    In:  Supplement to: Schumann, Dieter; Nagel, Ulrich (1982): Leg 68: Shore-based x-ray mineralogy. In: Prell, WL; Gardner, JV; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 68, 397-402, https://doi.org/10.2973/dsdp.proc.68.113.1982
    Publication Date: 2023-06-27
    Description: Eighty-four sediment samples from four holes at Site 502 and 54 samples from three holes at Site 503 were analyzed for mineral content by semiquantitative X-ray diffraction methods. Site 502 is located in the Western Caribbean, whereas Site 503 lies in the Eastern Pacific (probably on the north flank of the Galapagos Spreading Center). Both sites were chosen to yield continuous core sections for investigations of late Neogene and Quaternary biostratigraphy and magnetostratigraphy and to study events such as the closing of the Isthmus of Panama. Our X-ray diffraction work should provide a framework for further investigations - for example, determination of climatic changes in relationship to clay mineral composition or the influx of terrigeneous sediment components from South America before and after development of the Panama landbridge.
    Keywords: 68-502; 68-502A; 68-502B; 68-502C; 68-503A; 68-503B; Caribbean Sea/RIDGE; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg68; North Pacific/FLANK
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...