Norborna-diene → Binor-S

Participants

Reaction Steps

Norbornadiene (bicyclo[2.2.1]hepta-2,5-diene) was dimerized with the catalyst system CoBr2 -(triphenylphosphine)2 -boron trifluoride etherate. The structure of the diene is as follows: ##STR3## Afterwards methylene chloride was used to dissolve the organic phase of the reaction mixture and to separate the latter from the inorganic phase of catalyst components. Then the methylene chloride solution was washed with potassium carbonate to neutralize any free halogen acid and dried with the use of a drying agent such as anhydrous sodium sulfate. Upon cooling the treated methylene chloride solution Binor-S crystallized. The crystals were filtered from the liquid and then vacuum distilled to give solid Binor-S which had a grayish tinge. The foregoing procedure has been described in the literature. This procedure yields a Binor-S containing a trace amount of indigenous halide.

Provenance & Evidence