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  • 1
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 84 (1965), S. 213-224 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Es wurde die Reaktion von Ferrocen mit Furfural untersucht. Dabei wurde gefunden, daß in der Schmelze mit LEWIS-Säuren als Katalysatoren Kondensation erreicht werden kann. Die entstehenden Polymeren sind überwiegend linear. Die Ketten setzen sich aus Ferrocenylen- und Methin-Einheiten zusammen; die letzteren tragen 2-Furyl-Substituenten. Die Molekulargewichte (Zahlenmittel) liegen im Bereich von etwa 800 bis 4500. Ein Strukturbewies für diese Produkte ergibt sich aus chemischer, IR- und NMR-Analysis von unfraktionierten wie fraktionierten Proben. Einheitlichere Fraktionen wurden zur Bestimmung des Anteils an homoannularer Bindung innerhalb der Polymerkette verwendet. Mehrere Konkurrenzreaktionen unter Einbeziehung der 2-Furyl-Gruppe wurden beobachtet.
    Notes: The interaction of ferrocene with furfural has been investigated. It has been found that condensation can be achieved in the melt phase, with LEWIS acids as catalysts. The resulting polymers are predominantly linear, with chains composed of alternating ferrocenylene and methine units and 2-furyl substituents attached to the latter. The number-average moleculare weights range from approximately 800 to 4500. Structural evidence for these products has been derived from chemical, infrared and nuclear magnetic resonance spectroscopic analyses on non-fractionated and subfractionated samples. Subfractions of enhanced monodispersity have been utilized for determination of degree of homoannular bonding along the polymer backbone. Several competing side-reactions involving the 2-furyl group have been observed.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-1: Polymer Chemistry 4 (1966), S. 2145-2160 
    ISSN: 0449-296X
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: As an extension of earlier work on the condensation of ferrocene with aldehydes, the polycondensation of ferrocene with p- and o-carboxybenzaldehyde is described. While, in the former case, regular polycondensation occurs giving rise to a polymer composed of ferrocenylene and 4-carboxybenzal units, a deviation from this route is observed in the o-carboxybenzaldehyde case, where a polymer containing both carboxybenzal and 3,3-phthalide bridging units between the ferrocenylene groups is formed instead. This unexpected behavior can be accounted for by a hydride abstraction mechanism. In support of the polymer structure proposed, 3-ferrocenylphthalide and 3,3-diferrocenylphthalide are isolated as intermediates or by-products. In both polymer series, number-average molecular weights up to 3000 (unsubfractionated) are measured. The polymers are soluble in a number of organic solvents and can be cured with epoxides.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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