Aus den Amiden (I) bis (III) bilden sich mit Iod und Iodwasserstoff Hydrogentriiodid‐Komplexe, deren Struktur durch vergleichende IR‐ und Röntgenstruktur‐Analyse geklärt wird.
Polyvinylpyrrolidone forms complexes with hydrogen halides (HX; X = C1, Br, I) and halogen molecules (Y2; Y = Br, I). For these compounds a structure is proposed in which the proton is coordinated to the carbonyl groups of two pyrrolidone rings by strong hydrogen bonds. The XYf-anion is attached ionically to this complex cation. The structure of these complexes could be elucidated by comparative examination of the Lig, . HX -Y,-cornplexes of model compounds such as N,N-dimethylacetamide, N-alkyl-2-pyrrolidones (213d), and 1,3-bis(2-oxo-l -pyrrolidinyl)butane (3) and the analogous polyvinylpyrrolidone complexes. The structure of the (N-methyl-pyrrolidone)2 * H13-complex was examined by X-ray structure analysis. In a similar way the potassium salts (Lig, * KX . Y,) of the complex acids could be prepared from the ligands, potassium halides, and halogen molecules. Unlike the proton, the potassium cation appears to be only weakly attached to the carbonyl groups of the ligands. *) Systematischer Name: Poly [ 1 -(2-oxo-1 -pyrrolidinyl)ethylene] .
ZUS AM MEN FASSUNG :Durch radikalische Losungspolymerisation wurden Homopolyrnere von 3(bzw. 5)-Vinylpyrazol-derivaten erhalten und deren Eigenschaften untersucht. Durch Copolymerisation von 2,s Mol-Yo Bis-[3(bzw. S)-vinyl-S(bzw. 3)-pyrazolyll-keton mit 3(bzw. 5>Vinyl-5(bzw. 3)-pyrazol-carbonsiiureathylester (I) bzw. 3(bzw. 5)-Vinyl-4.5(bzw. 3)-pyrazol-dicarbonPuredimethylester (11) wurden Harze dargestellt, die nur begrenzt quellbar sind und die durch Verseifung in Poly-[vinyl-pyrazol-carbonslurel-harze ( H a n A1 und Harz Az) uberfuhrt wurden. Diese Harze stellen hochkapazitive Chelathane dar. Es wurde das Metallionenbindungsvermogen fur Cuze, Ni2@, Zn2@ und Mgas und die Aufnahmegeschwindigkeit in Abhingigkeit vorn pH-Wert im Bereich von pH 1 bis pH 5,5 untersucht.
SUMMARY:Homopolymers of 3(resp. 5)-vinyl-pyrazolderivates were obtained by radical solution polymerisation and their properties were examined. Resins of limited swelling were prepared by copolymerisation of 2.5 mole-yo bis-[3(resp. 5)-vinyl-5(resp. 3)-pyrazolyl]-ketone with 3(resp. S)-vinyl-S(resp. 3)-pyrazolecarboxylic acid ethyl ester (I) or 3(resp. 5)-vinyl-. 4.5(resp. 3)-pyrazoledicarboxylic acid dirnethyl ester (11). By saponification they were converted to poly-vinyl-pyrazole-carboxylic acid resins (resin A1 and resin A$. The latter are chelating resins of high cnpacity. The possibility of binding the metal ions C d @ , Nim.Zna@, and Mg2@ and the sorption rate was studied in the pH range 1-5.5.
Einleitung
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.