ISSN:
0009-2940
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Syntheses with Aliphatic Dialdehydes, XXXVII, Synthesis, Structure, and Properties of a [3.3.3.]Decamethinium Cyanine Dye, with Indoline End GroupsThe reaction of the trisaldehyde trisacetal 4 with 1,3,3-trimethyl-2-methyleneindoline (7) and its tetrafluoroborate 8 yields either the δ-substituted heptamethinium cyanine dye 9 or the [3.3.3]decamethinium cyanine dye 10, depending on the reaction conditions. Configuration and conformation of both polymethine dyes have been determined by means of spectroscopic data as well as by X-ray analyses. - The UV/Vis-spectroscopic 〈trimethine shift“ of trinuclear, Y-Conjugated, methinylogous guanidinium ions is compared with the “vinylene shift” of dinuclear, linear-conjugated, vinylogous amidinium ions (Table 1).
Notes:
Durch Umsetzung des Trisaldehyd-trisacetals 4 mit 1,3,3-Trimethyl-2-methylenindolin (7) und dessen Tetrafluoroborat 8 werden je nach Reaktionsbedingungen entweder der δ-substituierte Heptamethinium-Cyaninfarbstoff 9 oder der [3.3.3]Decamethinium-Cyaninfarbstoff 10 erhalten. Konfiguration und Konformation beider Polymethinfarbstoffe werden spektroskopisch sowie durch Röntgenstrukturbestimmungen ermittelt. - Der UV/Vis-spektroskopische „Trimethinsprung“ trinuclearer, Y-konjugierter, methinyloger Guanidinium-Ionen wird mit dem „Vinylensprung“ dinuclearer, linear-konjugierter, vinyloger Amidinium-Ionen verglichen (Tab. 1).
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19831160525
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