ISSN:
0009-2940
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Theoretical and Spectroscopical Investigations of Indigo Dyes, XVII. Preparation and Crystal Structure of 2,2,5,5-Tetramethyl-2,3,5,6-tetrahydrothieno[3,2-b]thio-phene-3,6-dione, a Basic Chromophoric System of Thioindigo Dyes with trans-s-trans-s-trans-Configuration of the Carbonyl GroupsThe tetrasubstituted 3,6-octanedione 14 reacts with sodium sulfide to yield the thienothiophene derivative 16, the first compound containing the basic chromophoric system of the thioindigo dyes with trans-s-trans-s-trans-configuration of the carbonyl groups. This compound is also available by oxidative dimerization of the thietanone 26 involving a molecular rearrangement of the thietane skeleton. - The crystal structure of 16 was determined by X-ray analysis (R = 0.064).
Notes:
Das tetrasubstituierte 3,6-Octandion 14 reagiert mit Natriumsulfid zum Thienothiophen-Derivat 16, dem ersten Thioindigo-Grundchromophorsystem mit trans-s-trans-s-trans-Konfiguration der Carbonylgruppen. Diese Verbindung ist auch durch oxidative Dimerisierung des Thietanons 26 zugänglich, wobei Gerüstumlagerung eintritt. - Die Kristallstruktur von 16 wurde durch Röntgenanalyse bestimmt (R-Faktor von 0.064).
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19771100425
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