Abstract: A process for the preparation of copolymers of carbon monoxide with an olefinically unsaturated compound comprising copolymerizing the monomers in the presence of a catalyst composition based upon(a) a salt of a Group VIII metal, and(b) a cation which is selected from cationic oxidants and cations of the general formulae R.sub.n H.sub.4-n N.sup.+, R.sub.m H.sub.3-m C.sup.+ and R.sub.m H.sub.3-m O.sup.+, wherein n is 0, 1, 2, 3 or 4, m is 2 or 3, and R represents a hydrocarbyl group and/or two or three of R together with the atom carrying a positive charge represent a ring structure, on the understanding that when n is 3, at most two of R together with nitrogen represent a heterocyclic ring structure, and when n is 4, three of R together with nitrogen represent an aromatic heterocyclic ring structure.

Abstract: A process for the copolymerization of carbon monoxide with an olefinically unsaturated compound comprising contacting the monomers in the presence of a liquid diluent with a catalyst composition which is based on(a) a source of a Group VIII metal,(b) a bidentate ligand of the general formulaR.sup.1 R.sup.2 M.sup.1 --R--M.sup.2 R.sup.3 R.sup.4 wherein M.sup.1 and M.sup.2 independently represent a phosphorus, arsenic or antimony atom, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represent unsubstituted or substituted hydrocarbyl groups on the understanding that at least one of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 represents a polar substituted aryl group and R represents a bivalent bridging group containing at least two carbon atoms in the bridge, and(c) a boron hydrocarbyl compound,with application of a stirring power transmitted to the polymerization mixture of at least 0.25 kW/m.sup.3.

Abstract: A process for the copolymerization of carbon monoxide with an olefinically unsaturated compound in which a solid particulate material is suspended in a liquid diluent in which the polymer to be produced forms a suspension. The monomers are contracted in the liquid diluent containing the suspended solid particulate material with a catalyst composition which is based on a source of a Group VIII metal and a boron hydrocarbyl compound.

Abstract: A process for the copolymerization of carbon monoxide with an olefinically unsaturated compound in which the monomers are contacted in the presence of a liquid diluent and a protic compound with a catalyst composition which is based on a source of a Group VIII metal and a hydrocarbylborane. A stirring power is transmitted to the polymerization mixture of at least 0.25 kW/m.sup.3.

Abstract: A process for the copolymerization of carbon monoxide with an olefinically unsaturated in which the monomers are contacted with a catalyst composition which is based on a source of a Group VIII metal and a boron hydrocarbyl compound. Additional boron hydrocarbyl compound is added to the polymerization mixture during the copolymerization or when the catalyst has lost its activity. A process for recycling a polymerization catalyst is also presented. It includes the steps of recovering a Group VIII metal composition from a preceding copolymerization process for the preparation of a copolymer of carbon monoxide and an olefinicaIly unsaturated compound and adding a boron hydrocarbyl compound to the Group VIII metal composition.

Abstract: Novel compounds of the general formula ##STR1## wherein R represents a hydrogen or halogen atom or a (cyclo) alkyl group, R.sup.3 represents H, CH.sub.3, or OCH.sub.3, n=0 or 1, and when n=0, R.sup.2 represents a hydrogen atom and R.sup.1 a hydrogen atom or a monovalent substituent thereby forming an alkoxide, ether, ester, or other alcohol derivative, and when n=1, each R.sup.1 and R.sup.2 independently represents one of the atoms specified for R.sup.1 when n=0, or R.sup.1 and R.sup.2 together represent a bivalent group thereby forming a cyclic ether, ester, or other diol derivative, have useful herbicidal properties.

Abstract: An aniline is alkylated on the ring by treating it with an alkylating agent, preferably an alkyl chloride, in the liquid phase, and in the presence of at least 1.02 mole of an aluminum halide per mole of the aniline.

Abstract: A process for preparing the cis-racemate of 3-azabicyclo-(3.1.0)hexane-2-carboxylic acid, and certain novel intermediates involved therein.

Abstract: Preparation of alkylidenecyclobutane derivatives and of cyclobutene derivatives by contacting a (cyclo)alkene with an allene or with a 1-alkyne in the liquid phase in the presence of a dissolved Lewis acid derived from an element of Group III A of the Periodic Table of the Elements, titanium, tin, antimony, tantalum, rhenium, iron, or zinc.

Abstract: Preparation of alkylidenecyclobutane derivatives and of cyclobutene derivatives by contacting a (cyclo)alkene with an allene or with a 1-alkyne in the liquid phase in the presence of a dissolved Lewis acid derived from an element of Group III A of the Periodic Table of the Elements, titanium, tin, antimony, tantalum, rhenium, iron, or zinc.