Library

feed icon rss

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of chemical crystallography 4 (1974), S. 403-410 
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The visible and ultraviolet absorption spectra of crystalline 5-anilinopenta-dienylidenaniliniumbromide have been measured with a microreflexion spectrometer, using polarized light. The (110) crystal plane shows exceptional dichroism, which is interpreted from the results of X-ray structure analysis as being due to the approximately parallel arrangement of the molecular oscillators.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 203-216 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: X-Ray Crystal Structure Analysis of Bis(10-methyl-9-acridine)monoazamonomethinecyanine PerchlorateThe structure analysis of the title compound is described and its molecular and crystal structure discussed. The space group is P212121 with lattice parameters a = 19.765, b = 13.945, c = 8.436 Å, and 4 formula units per unit cell. Steric hinderance in the cation leads to a compromise between rotation of the ring systems (65.5°) and an increase in bond angles. The bond angle at the central nitrogen for example is 136.5°. PPP-Calculations have been carried out for the dyestuff cation. The u. v. spectrum of the crystal is compared with that of the solution. The space group is acentric containing only one of the two enantiomers, whereas the solution is racemic.
    Notes: Die Röntgenstrukturanalyse des Bis-[10-methyl-acridin-(9)]-monoazamonomethincyanin-perchlorats wird beschrieben und die Molekül- und Kristallstruktur diskutiert. Raumgruppe: P212121, a = 19.765, b = 13.945, c = 8.436 Å mit 4 Formeleinheiten pro Elementarzelle. Die sterische Hinderung im Kation führt zu einem Kompromiß zwischen Verdrillung der Teilsysteme (65.5°) und Aufweitung von Winkeln (z. B. am zentralen Stickstoff 136.5°). Außerdem wurden am Farbkation PPP-Rechnungen durchgeführt. Ein UV-Kristallspektrum ist einem Lösungsspektrum gegenübergestellt. Die Raumgruppe ist azentrisch und führt daher zum Einbau gleicher optischer Antipoden aus einer racemischen Lösung.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...