1,2-Dicarbonic acid dichlorides

Dicarbadodecaborane, preparation and structure of, 5 342-343 Dicarbomethoxy acetylene, 45 48, 49 Dicarbon decaboranes, 26 85 base degradation, 26 90 bonding, 26 62 dianions, 26 78-79 reaction with Lewis bases, 26 85 1,2-Dicarbonic acid dichlorides, 33 300 Dicarbon nonaborane anion, oxidative coupling, 26 73... 

The trans- 1,2-dicarbonic acid dichlorides of cyclohexane, cylopen-tane, cyclobutane, and bicyclo[2.2.2]2,3 5,6-dibenzoocta-2,5-diene react with phenyl-, i-butyl-, and cyclohexylbis(trimethylsilyl)phosphanes [Eq. (52)], as determined by the spectroscopically detectable inter-... 

Because of an extremely fast valence isomerization, the 1,6-diphospha-l,5-hexadienes have not yet been isolated. The stereochemistry of the reaction is related to the dicarbonic acid dichloride precursors, which show a fixed bisequatorial orientation of the two... 

PA 6.6 membranes were stirred with a solution of 1.8 mmol N-ethyldiisopropyl amine and 1.8 mmol dicarbonic acid dichloride in 3 ml ether for 30 min. Residual acid chloride groups were hydrolysed with 0.5 M NaHC03 solution. The membranes were rinsed with deionised water. 

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