Abstract: A system comprising a) Ni(0) b) from 4 to 10 mol per mol of Ni(0) in a) of a compound (I) of the formula P(X1R1)(X2R2)(X3R3)??(I) where X1, X2, X3 are each, independently of one another, oxygen or a single bond, R1, R2, R3 are, independently of one another, identical or different organic radicals and c) from 1 to 4 mol per mol of Ni(0) in a) of a compound (II) of the formula where X11, X12, X13 X21, X22, X23 are each, independently of one another, oxygen or a single bond, R11, R12 are identical or different, individual or bridged organic radicals, R21, R22 are identical or different, individual or bridged organic radicals and Y is a bridging group is suitable as catalyst for preparing mixtures of monoolefinic C5 mononitriles having nonconjugated C?C and C?N bonds by hydrocyanation of a 1,3-butadiene-containing hydrocarbon mixture and for preparing a dinitrile by hydrocyanation of a mixture of monoolefinic C5 mononitriles having nonconjugated C?C and C?N bonds.

Abstract: Process for preparing unsubstituted or nuclear-substituted ?-chloroalkyl pyridyl ketones and/or their hydrochlorides by reacting the corresponding unsubstituted or nuclear-substituted alkyl pyridyl ketone hydrochlorides with sulfuryl chloride at a reaction temperature of from ?25 to 70° C. (248 to 343 K) and a pressure of 0.05 to 0.2 MPa abs, in which the reaction is carried out in the presence of an unbranched or branched C1 to C10-alkanoic acid which is unsubstituted or monosubstituted to completely substituted by a radical selected from the group of fluorine, chlorine and bromine and whose melting point is below the chosen reaction temperature.

Abstract: A process for preparing ?-(3-arylthio)acetophenones of the general formula I where the substituents R1 and R2 are each independently C1-C6-alkyl or an optionally substituted phenyl or benzyl radical, which comprises A) reacting acetophenones of the general formula II where the substituent R1 is as defined above with sulfuryl chloride and subsequently hydrolyzing, and B) reacting the reaction mixture obtained in this way with a thiophenol of the general formula III where the substituent R2 is as defined above

Abstract: A system comprising a) Ni(0) b) from 4 to 10 mol per mol of Ni(0) in a) of a compound (I) of the formula P(X1R1)(X2R2)(X3R3) ??(I) where X1, X2, X3 are each, independently of one another, oxygen or a single bond, R1, R2, R3 are, independently of one another, identical or different organic radicals and c) from 1 to 4 mol per mol of Ni(0) in a) of a compound (II) of the formula where X11, X12, X13 X21, X22, X23 are each, independently of one another, oxygen or a single bond, R11, R12 are identical or different, individual or bridged organic radicals, R21, R22 are identical or different, individual or bridged organic radicals and Y is a bridging group is suitable as catalyst for preparing mixtures of monoolefinic C5 mononitriles having nonconjugated C?C and C?N bonds by hydrocyanation of a 1,3-butadiene-containing hydrocarbon mixture and for preparing a dinitrile by hydrocyanation of a mixture of monoolefinic C5 mononitriles having nonconjugated C?C and C?N bonds.

Abstract: A system comprising a) Ni(0) b) from 4 to 10 mol per mol of Ni(0) in a) of a compound (I) of the formula P(X1R1)(X2R2)(X3R3) ??(I) where X1, X2, X3 are each, independently of one another, oxygen or a single bond, R1, R2, R3 are, independently of one another, identical or different organic radicals and c) from 1 to 4 mol per mol of Ni(0) in a) of a compound (II) of the formula where X11, X12, X13 X21, X22, X23 are each, independently of one another, oxygen or a single bond, R11, R12 are identical or different, individual or bridged organic radicals, R21, R22 are identical or different, individual or bridged organic radicals and Y is a bridging group is suitable as catalyst for preparing mixtures of monoolefinic C5 mononitriles having nonconjugated C?C and C?N bonds by hydrocyanation of a 1,3-butadiene-containing hydrocarbon mixture and for preparing a dinitrile by hydrocyanation of a mixture of monoolefinic C5 mononitriles having nonconjugated C?C and C?N bonds.

Abstract: A process for preparing ?-(3-arylthio)acetophenones of the general formula I in which the substituents R1 and R2 are each independently C1-C6-alkyl, SiR33 where the substituent R3 is a C1-C6-alkyl radical, or an optionally substituted phenyl or benzyl radical, which comprises reacting, in methanol acetophenones of the general formula II in which the substituent X is Cl or Br with a thiolate of the general formula III in which M is an alkali metal.

Abstract: A process for preparing ?-(3-arylthio)acetophenones of the general formula I where the substituents R1 and R2 are each independently C1-C6-alkyl or an optionally substituted phenyl or benzyl radical, which comprises A) reacting acetophenones of the general formula II where the substituent R1 is as defined above with sulfuryl chloride and subsequently hydrolyzing, and B) reacting the reaction mixture obtained in this way with a thiophenol of the general formula III where the substituent R2 is as defined above

Abstract: The invention relates to phosphinites I of formulae (1) or (2), in which R1, R2, R5, R6, R7, R8, R9 independently represent hydrogen, an alkyl or alkylene group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms; R3 is H or methyl; R4 is i-propyl or t-butyl; X is F, Cl or CF3 and n is 1 or 2

Abstract: Phosphonites I of the formula 1 or 2 where R1, R2 are each, independently of one another, hydrogen, an alkyl or alkylene group having from 1 to 8 carbon atoms or an alkoxy group having from 1 to 8 carbon atoms, with the proviso that R1 and R2 are not simultaneously H, R3 is H or methyl, R4 is t-butyl, R5, R6, R7, R8, R9 are each, independently of one another, H or an alkyl or alkylene group having from 1 to 8 carbon atoms.

Abstract: The invention relates to phosphinites I of formulae (1) or (2), in which R1, R2, R5, R6, R7, R8, R9 independently represent hydrogen, an alkyl or alkylene group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms; R3 is H or methyl; R4 is i-propyl or t-butyl; X is F, Cl or CF3 and n is 1 or 2.

Abstract: Phosphinites I of the formula 1, 2 or 3 where R1, R2, R4 are each, independently of one another, hydrogen, an alkyl or alkylene group having from 1 to 8 carbon atoms or an alkoxy group having from 1 to 8 carbon atoms, with the proviso that at least one of the groups R1, R2, R4 is not H, R3 is H or methyl X is F, Cl or CF3 n is 0, 1 or 2 can be used as catalysts.

Abstract: A catalyst system containing a) Ni (0), b) 4-10 mol per mol Ni (0) according to a) a compound (I) of formula P (X1R1) (X2R2) (X3R3) (I) wherein X1, X2, X3 independently represent oxygen or a single bond R1, R2, R3 represent independently, the same or different organic radicals, and c) 1-4 mol per mol Ni (0) according to a) a compound (II) of formula (II) wherein X11, X12, X13, X21, X22, X23 independently oxygen or a single bond, R11, R12 independently represent the same or different individual or bridged organic radicals, R21, R22 independently represent the same or different, individual or bridged organic radicals, Y represents a bridge group.