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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Russian chemical bulletin 35 (1986), S. 1311-1313 
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. Upon alkaline dehydrochlorination in diethyleneglycol, 1,1-dichloro-2,2-bis(p-chlorophenyl)ethane (DDD) and its analogs are converted to diarylmethanes. 2. Mo(CO)6 catalyzes the intramolecular rearrangement of DDD and the dehydrochlorination of the product, 1,2-bis(4-chlorophenyl)-1,2-dichloroethane to 1-chloro-1,2-bis(4-chlorophenyl)ethylene. 3. A two-step procedure was proposed for the synthesis of 1,2-diarylacetylenes involving dehydrochlorination of DDD compounds by the action of Mo(CO)6 to give 1-chloro-1,2-diarylethylenes and their subsequent alkaline dehydrochlorination.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Mit dem Ziel der Erhöhung der Wärmebeständigkeit von Polychinoxalinen wurde die Synthese von Poly(phenylchinoxalin-co-naphthoylenbenzimidazolen) durch katalytische Copolykondensation von Bis(o-phenylendiaminen) mit Bis(α-diketonen) und Bis(naphthalinsäureanhydriden) sowie einer Reihe von Phenylchinoxalin-Verbindungen mit Acenaphthylen-Gruppen durchgeführt. Durch Einwirkung höherer Temperaturen wurden daraus vernetzte, thermisch stabile Strukturen erhalten. Der Einfluß des Verhältnisses der Phenylchinoxalin-zu den Napthoylbenzimidazolringen auf die Eigenschaften der Copolymere wurde untersucht.
    Notes: In order to improve the thermal stability of poyquinoxalines, the synthesis of poly(phenylquinoxaline-co-naphthoy-lenebenzimidazoles) through catalytic copolycondensation of bis(o-phenylene diamines) with bis(α-diketones) and bis(naphthalic anhydrides) and of a number of phenylquinoxaline compounds with acenaphthylene groups capable of thermal hardening to give cross-linked thermally stable structures has been developed. The influence of the ratio of phenylquinoxaline and naphthoylene benzimidazole cycles on the fundamental properties of the copolymers has been studied.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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