Dihalogenfunktionelle Verbindungen der allgemeinen Formel (I) reagieren mit den Alkalimetallphosphiden (II) entweder unter Ringschluß zu den luft‐ und feuchtigkeitsempfindlichen Titelverbindungen (III) oder im Sinne eines Metall‐Halogen‐Austausches, wobei u.a. 1,2‐Diphenyl‐1,2‐diphospholan entsteht.
A series of 2‐nitroolefins was synthesized and polymerized, with particular attention given to 2‐nitrobutene. Several catalysts were compared, and the sodium cyanidedimethylformamide system studied in detail. Monomer aging had a pronounced effect on the polymerization of the nitromonomers. The polymerization under ideal conditions is exceedingly fast, and evidence favors chain termination by chain transfer to monomer. Molecular weights, even under optimum conditions, were low, and solvents with high dielectric constants were ordinarily necessary for polymer formation. The effect of chain length on polymer properties was also determined.
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