Claims
- 1. Process for the catalytic codimerization of norbornadiene and 1,3-cyclohexadiene comprising:
- (a) contacting norbornadiene and 1,3-cyclohexadiene in the presence of a catalytic amount of a three-component homogeneous catalytic system consisting of cobaltic or cobaltous acetylacetonate, 1,2-bisdiphenylphosphino ethane and one of the following alkyl aluminum chlorides: diethylaluminum chloride, ethyl aluminum dichloride and ethyl aluminum sesquichloride;
- (b) having the contacting occurring at a temperature within the range from between about 20.degree. C. to about 100.degree. C.; and
- (c) continuing the contacting until the codimer of norbornadiene and 1,3-cyclohexadiene is prepared.
- 2. Process according to claim 1 wherein the bisdiphenylphosphino ethane to the acetylacetonate mole ratio is in the range between from about 0.1 to about 5.
- 3. Process according to claim 1 wherein the norbornadiene to the 1,3-cyclohexadiene mole ratio is in the range between from about 0.01 to about 10.
- 4. Process according to claim 1 wherein the alkyl aluminum chloride to the acetylacetonate mole ratio is in the range between from about 0.5 to about 100.
- 5. Process according to claim 1 wherein the norbornadiene to the acetylacetonate mole ratio is in the range between from about 10 to about 2000.
- 6. Process according to claim 5 wherein an inert solvent is present.
- 7. Process according to claim 6 wherein the inert solvent is selected from the group consisting of aromatic hydrocarbon, cycloparaffin, cycloolefin, ether, halogenated aromatic, halogentated paraffin and halogenated cycloparaffin.
- 8. Process according to claim 7 wherein the bisdiphenylphosphino ethane to the acetylacetonate mole ratio is in the range between from about 0.1 to about 5.
- 9. Process according to claim 8 wherein the alkyl aluminum chloride to the acetylacetonate mole ratio is in the range between from about 0.5 to about 100.
- 10. Process according to claim 9 wherein the norbornadiene to the 1,3-cyclohexadiene mole ratio is in the range between from about 0.01 to about 10.
CROSS REFERENCE TO RELATED APPLICATION
This is a division of application Ser. No. 933,231, filed Aug. 14, 1978, which is a continuation of application Ser. No. 818,489, filed July 25, 1977 abandoned.
US Referenced Citations (5)
Non-Patent Literature Citations (2)
Entry |
Greco et al., J. Org. Chem., 35, No. 1, 271, 1970. |
Carbonaro et al., J. Org. Chem., 36, No. 10, 1443, 1971. |
Divisions (1)
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Number |
Date |
Country |
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933231 |
Aug 1978 |
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Continuations (1)
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Number |
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818489 |
Jul 1977 |
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