The crude material displayed a broad carboxylic dimer stretch at 2950 cm-1 and a strong acid carbonyl stretch at 1630 cm-1. Both absorptions disappeared after recrystallization from acetone in the presence of dilute base. ( 9) Redistilled from LÍAIH4 or Cal-h under nitrogen and stored over molecular sieves. (10) Stored over sodium ribbon.
1,1‐Dichlorcyclopropan (I) wird in Tetrachlorkohlenstoff um 0°C zu den chlorierten Propanen (II) und (III) neben geringen Anteilen des Isomeren (IV) substituiert, während bei der Photobromierung das 1,3‐Dibrom‐1,1‐dichlorpropan (V) erhalten wird.
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