Abstract: The present invention relates to the preparation of trimethylcyclododecatriene in a continuous or batchwise process by trimerizing isoprene in the presence of a catalyst system and of a solvent. It is possible to isolate the resulting crude trimethylcyclododecatriene by means of distillation. The dimethylcyclooctadiene formed as a by-product may likewise be isolated from the crude product.

Abstract: Preparation of cyclododecatriene in a continuous or discontinuous process by trimerization of butadiene in the presence of a catalyst system and a solvent, the crude cyclododecatriene obtained being able to be isolated by means of distillation. The cyclooctadiene formed as by-product can likewise be isolated from the crude product.

Abstract: A polyunsaturated hydrocarbon, 6-(2,7-octadienyl)-1,4-cyclooctadiene. 6-(2,7-Octadienyl)- 1,4-cyclooctadiene is prepared by reacting butadiene-1,3 in the presence of a catalyst system consisting of a nickel complex, an organic phosphite and dialkylaluminum alkoxide, removing unreacted butadiene-1,3 starting material and cyclooctadiene and cyclododecatriene material formed in the reaction from the reaction product obtained, and fractionally distilling 6-(2,7-octadienyl)-1,4-cyclooctadiene from the material obtained after the distillative separation of butadiene-1,3, cyclooctatriene and C12 compounds.

Abstract: A process for producing octadienes comprises, on synthesis of octadienes by reacting butadiene with formic acid in the presence of a palladium catalyst, controlling the reaction pressure at not more than the vapor pressure of butadiene at the reaction temperature employed, thereby suppressing formation of byproducts which would accumulate in a catalyst-containing layer and minimizing the decrease of reaction rate and selectivity which would occur by such accumulation.

Abstract: Iron nitrosyl carbonyl catalyst is prepared by dissolving impure iron nitrosyl carbonyl in a solvent solution, then adding sufficient miscible non-solvent to the solution to result in separation of the mixture into an upper layer and a lower layer containing iron nitrosyl carbonyl. Preferably, the solvent is used in preparation of the iron nitrosyl carbonyl, and the solution is, therefore, the product of the preparation. The miscible non-solvent is added to the product solution to effect separation of layers for isolation of purified iron nitrosyl carbonyl product.

Abstract: The invention relates to azaphospholene of the type ##STR1## wherein R.sub.1 and R.sub.2 may be alkyl, aryl and aralkyl groups, processes for preparing same and the use thereof.

Abstract: This specification discloses an insoluble resin-metal compound complex, the method for its preparation, and its use in carrying out a catalyzed reaction. The complex is a weak base anion exchange resin which has been contacted with a solution of a coordination compound having at least two ligands connected to at least one central metal atom to bond chemically the resin to the metal atom by replacement of at least one of the ligands of the coordination compound by a functional group of the weak base anion exchange resin. The complex can be used as a catalyst for hydrogenation, carbon monoxide insertion, polymerization, isomerization, vinyl ester exchange, and ethylene oxidation reactions, among others.

Abstract: A method of preparing trans-, trans-, trans-1,5,9-cyclododecatriene which comprises cyclotrimerization of butadiene at a temperature within the range of from 50.degree. to 150.degree. C. in the presence of a catalytic system consisting of a compound of bivalent nickel, an organo-aluminium compound of the formula (1) or (2):R.sub.3 Al (1)andR.sub.2 Al--X (R').sub.n (2)wherein R, and R' are each C.sub.2 H.sub.5 --, ##STR1## X is --O-- when n=1 and --N-- when n=2; and an activator, viz. a compound of formula (3) or (4):R.sub.3 Si--OR' (3)wherein R is an alkyl; R' is an alkyl, C.sub.6 H.sub.5 --, C.sub.6 H.sub.11,N(CRR'--CRR"--O).sub.3 B (4)wherein R and R" are each CH.sub.3 --, C.sub.2 H.sub.5 --, C.sub.6 H.sub.10, C.sub.8 H.sub.11 --, H--; R is H--.The method according to the present invention makes it possible to increase the yield of the desired product up to 95% by weight.

Abstract: The process for making cyclododecatriene(1,5,9)-enes by catalytically trimerizing butadiene using a catalyst from a titanium halide and an alkylaluminum halide in the presence of hydrocarbons or halogenated hydrocarbons is improved by carrying out the reaction in the presence of dibenzyenes having the general formula ##STR1## where R.sub.1 through R.sub.6 represent hydrogen atoms, halogen atoms, alkyl groups, aralkyl groups, cycloalkyl groups, or aryl groups, the dibenzylbenzenes being used in at least equimolar amounts with respect to the titanium compound.

Abstract: 1,5-Dimethyl-1,5-cyclooctadiene and 1,4-dimethyl-4-vinyl-1-cyclohexene are prepared by contacting isoprene with a catalyst obtained by mixing a nickel compound, a reducing agent capable of reducing the nickel to zerovalent nickel, and a trihydrocarbyl phosphite, arsenite or antimonite wherein at least one of the three hydrocarbyl groups is a substituted hydrocarbyl group CF.sub.3 --(CF.sub.2).sub.n C(H)(R)--, in which n.gtoreq.0 and R is an optionally substituted hydrocarbyl group. Only very small amounts of the undesired 1,6-dimethyl-1,5-cyclooctadiene are formed.