Abstract: Heteropolymetallic clusters of the formula Pd.sub.2 (Fe).sub.x (CO).sub.4 [CO(NO).sub.2 ].sub.y [bis(diphenylphosphine)methane].sub.2 wherein x is 1 or 2 and y is 0 or 1; x=2 when y=1 and x=1 when y=0; to the method of making such clusters by reacting Pd.sub.2 Cl.sub.2 [bis(diphenylphosphine)methane] with MnFe(CO).sub.3 Z wherein M is an alkaline metal and Z is CO (n=2) or NO (n=1); and to the novel catalysts formed utilizing said clusters.
Type:
Grant
Filed:
January 14, 1985
Date of Patent:
September 2, 1986
Assignee:
ATOCHEM
Inventors:
Pierre Braunstein, Jacques Kervennal, Jean-Luc Richert, Michel Ries
Abstract: The invention relates to a process for the dimerization of derivatives of acrylic acid in the homogeneous phase which process is characterized in that a compound having the general formula H.sub.2 C.dbd.CR.sup.1 -COOR.sup.2, wherein R.sup.1 represents H or a linear alkyl group having from 1 to 3 carbon atoms and R.sup.2 represents a linear alkyl group having from 1 to 3 carbon atoms, is reacted in a solvent at a temperature of from -50.degree. C. to +50.degree. C. in the presence of nickel compounds as catalysts which contain complex anions X in a molar ratio Ni:X=1:1 and organic or hydride ligands and are modifed with phosphanes having the general formula PR.sub.2 R', wherein R and R' may be same or different and represent alkyl residues having from 1 to 8 carbon atoms or phenyl residues, as well as the use of the dimers formed in the dimerization.
Type:
Grant
Filed:
October 3, 1984
Date of Patent:
June 10, 1986
Assignee:
Studiengesellschaft Kohle mbH
Inventors:
Gunther Wilke, Karin Sperling, Ludwig Stehling
Abstract: A new method for making platinum-phosphine complexes and novel platinum-phosphine-vinylsiloxane complexes are disclosed. These complexes can be used in curable silicone compositions, thus providing curable silicone compositions of greatly enhanced stability at room temperature. The ability of the compositions to cure at elevated temperatures is not significantly compromised.
Abstract: Compositions of formula (I):Q.sub.3 XW.sub.4 O.sub.24-2n (I)wherein:Q represents a cation of an "onium" salt;X is either a P or an As atom; whilen is 0, 1 or 2.The preparative method consists in reacting an oxygenated tungsten (VI) derivative, an oxygenated P (V) or As (V) derivative, and hydrogen peroxide, in an aqueous acid phase, with an "onium" salt or a precursor thereof, if desired contained in an organic phase immiscible with the aqueous phase, at substantially room temperature. The oxygenated compounds of W (VI), P (V) or As (V) may be prepared "in situ" under the conditions of the reaction.Compositions (I), which appear as solids or as viscous oils, find use as oxidizing agents in general in oxidation processes, and especially as epoxidation catalysts for olefinic compounds, both in a homogeneous phase as well as in a heterogeneous phase, and preferably according to the phase-transfer technique, in the presence of oxidizing agents.
Type:
Grant
Filed:
November 10, 1983
Date of Patent:
December 31, 1985
Assignee:
Montedison S.p.A.
Inventors:
Carlo Venturello, Rino D'Aloisio, Marco Ricci
Abstract: A hydroformylation catalyst of the formulaL.sub.a CuCo(CO).sub.b L'cwherein L is a monodentate phosphine, a bidentate phosphine or a bidentate amine, a is 1-3, b is 3 or 4, c is 0 or 1; provided that, where b=4, c=0 and L' is CO, phosphine or phosphite. Where the catalysts have the formulaL.sub.a CuCo(CO).sub.4the compounds are novel.
Type:
Grant
Filed:
December 21, 1983
Date of Patent:
November 5, 1985
Assignee:
Exxon Research and Engineering Co.
Inventors:
Gerald Doyle, Kenneth A. Eriksen, Roy L. Pruett
Abstract: Compositions of the formula [(Cat.sup.n)].sub.3/n [Co(MoS.sub.4).sub.2 ] wherein Cat is a mono, di or trivalent cation and n is 1, 2 or 3, respectively, have been prepared in non-aqueous media. The [Co(MoS.sub.4).sub.2 ].sup.3- anion has the general structure ##STR1## Cat is preferably an alkyl substituted quaternary ammonium compound.
Type:
Grant
Filed:
July 29, 1983
Date of Patent:
October 15, 1985
Assignee:
Exxon Research and Engineering Co.
Inventors:
Edward I. Stiefel, Wie-Hin Pan, Stephen McKenna
Abstract: Novel linear polymers of ferrocene are prepared by the reaction of 1,1'-dilithioferrocene with controlled amounts of a dihaloorganylphosphine, arsine or stibine. The polymers form stable complexes with Group VIII metals which are useful as recoverable hydroformylation catalysts.
Type:
Grant
Filed:
November 9, 1981
Date of Patent:
August 20, 1985
Assignee:
The Dow Chemical Company
Inventors:
Jere D. Fellmann, Philip E. Garrou, Howard P. Withers, Jr., Dietmar Seyferth
Abstract: Catalyst systems for the oligomerization and/or isomerization of olefins which comprise a nickel (II) complex and a co-catalyst. The nickel (II) complex is a square planar species with a trivalent Group V donor ligand, preferably a phosphine or phosphite ligand, a halogen or pseudo-halogen ligand and a bidentate dithio ligand, especially a substituted dithio-.beta.-diketone ligand.
Type:
Grant
Filed:
October 17, 1983
Date of Patent:
August 6, 1985
Assignee:
Commonwealth Scientific and Industrial Research Organization
Abstract: A process is provided for preparing nickel ylides which are themselves novel compounds defined by the following Formula I: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.