Cyclodimerization of 3,3-dimethylcyclopropene in the presence of Ziegler-Natta nickel systems
The effect of catalysts of the Ziegler type: Ni complexes combined with organo-aluminum compounds (OAC), was studied for the first time in the reaction of cyclodimerization of 3,3-dimethylcyclopropene (DMCP): the role of the individual components of these systems in this reaction was studied and it was shown that catalytic quantities of OAC activate the Ni complexes. Above a certain threshold concentration (in the conditions studied, > 0.05 g-atom Al/liter), OAC independently catalyze the reaction, apparently according to an ionic mechanism. The major role of the solvent in transformations of DMCP on the catalysts studied was revealed: highly selective cyclodimerization in ether (up to 93-95%) and fast polymerization with opening of the three-member ring in benzene. The results obtained are in agreement with the finding of dissociation of OAC in ether solutions with the formation of ion pairs.
- Research Organization:
- N.D. Zelinskii Institute of Organic Chemistry, Moscow, USSR
- OSTI ID:
- 5846185
- Journal Information:
- Bull. Acad. Sci. USSR, Div. Chem. Sci. (Engl. Transl.); (United States), Journal Name: Bull. Acad. Sci. USSR, Div. Chem. Sci. (Engl. Transl.); (United States) Vol. 36:1; ISSN BACCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
ACTIVATION ENERGY
ALKENES
ALUMINIUM CHLORIDES
ALUMINIUM COMPLEXES
ALUMINIUM COMPOUNDS
CARBONYLS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
CHROMATOGRAPHY
COMPLEXES
CYCLOALKENES
DEHYDROCYCLIZATION
DIMERIZATION
ENERGY
ETHERS
HALIDES
HALOGEN COMPOUNDS
HYDROCARBONS
INFRARED SPECTRA
NICKEL COMPLEXES
NMR SPECTRA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANOMETALLIC COMPOUNDS
POLYMERIZATION
RAMAN SPECTRA
SEPARATION PROCESSES
SOLVENT PROPERTIES
SPECTRA
TRANSITION ELEMENT COMPLEXES
ZIEGLER CATALYST