Abstract:
Bleichmittelzusammensetzung enthaltend ein oder mehrere Bleichmittel und einen oder mehrere Polyoxometallate der Formel (Q) q (A a X x M m O y Z z (H 2 O) b ·cH 2 O als Bleichkatalysator, wobei die Symbole Q, A, X, M, Z, q, a, x, m, y, z, b und c die in der Beschreibung genannten Bedeutung haben.
Abstract:
Die Erfindung betrifft chirale Mangan-triazanonankomplexe der Formel (I) [Mn u (L) v (OR) w (µ-O) x (µOAc) y ]X z worin bedeuten: u, v gleich 1 oder 2; w, x, y gleich 0, 1, 2 oder 3; z gleich 1, 2 oder 3 mit der Maßgabe, daß, wenn u = 1 ist, v = 1, w = 1, 2 oder 3, z = 1, 2 oder 3 sind, oder, wenn u = 2 ist, v = 2, w = 0 oder 1, x = 1, y = 2, z = 1 oder 2 sind, oder v = 2, w = 0 oder 1, x = 1, y = 2, z = 2 oder 3 sind, oder v = 2, w = 0 oder 1, x = 3, y = 0, z = 1 oder 2 sind;
R
(C 1 -C 12 )Alkyl,
X
PF 6 ⊖ , F ⊖ , Cl ⊖ , Br ⊖ , I ⊖ , (C 6 H 5 )B ⊖ , ClO 4 ⊖ bedeutet und
L
für einen chiralen organischen Triazanonan-Liganden der allgemeinen Formel (II) steht,
Abstract:
Prepn. of opt.solvated Ru porphyrin complexes of formula (IA) comprises reacting a RU(III) cpd.with the corresp. free porphyrin of formula (II) at 115-300 deg C. in an organic solvent and, if an O-free Ru(III) cpd. is used, adding \- an equimolar amt. of an (in)organic O cpd.; Ru(Porph)CO (IA); H2(Porph) (II); Ru(porph) = a gp. of formula (III): R = H, 1-10C alkyl,; or phenyl, opt. mono- or di-substd. by 1-10C alkyl. Also claimed are (IA), opt. solvated with a co-ordinating solvent; and complexes of the formula Ru(porph)O2 (IB).
Abstract:
Bis- and tris-( mu -oxo)-di-Mn complex salts of formula LMn( mu -O)a( mu -OAc)bMnLxAy (I) are new. Ac = 2-8 C acyl; a = 1, 2 or 3; b = 0 if a = 2 or 3 or b = 2 if a = 1; x = the no. of positive charges and = 2 or 3; A = an anion with 1 or 2 negative charges; y = the equiv. amt. of anion A to balance the positive charges; L = a ligand of formula (II) or (III); R = R' or phenyl; R' = 1-12 C alkyl, 5-10 C cycloalkyl, NH2, NHR2, N(R2)2, OH, OR2 or COOH; R1 = H, R', COOR2, Cl, Br, F or CN; R2 = 1-12 C alkyl or 5-10 C cycloalkyl; g = 2 or 3; m, n 0=4.
Abstract:
Manganiferous catalytically active polyoxometalates of formula (1) (Q)q (MnpAaXxYyMmOdZz(H2O)b) c H2O and the process for the manufacture thereof. In formula (I), Q, A, X, Y, M, Z, q, p, a, x, y, m, z, d, b and c have the following meaning: Q represents one or more cations selected from the group H, Li, K, Na, Rb, Cs, Ca, Mg, Sr, Ba, Al, PR R R R and NR R R R with R , R , R et R representing H or C1-C20-alkyl, C5-C8-cycloalkyl or aryl; subscript q falls in a range of 1 to 60, more especially in a range of 1 to 40 and, in the case of a single-value counter-cation, also describes the charge on the anionic unit; Mn is manganese; subscript p falls in a range of 0.1 to 10, A is a heterometal and represents one or more transitional metals of the 2 to 8 subsidiary groups except for Zn, especially Ru, V, Ti, Zr, Cr, Fe, Co, Cu, Sn, Ni, Re or Os; subscript a falls in a range of 0 to 10; X represents one or more elements selected from the group Ga, B, P, Si, Ge, As, F, Cl, Br and J; subscript x falls in the range of 0 to 10; Y represents Sb, S, Se, Te or Bi; subscript y falls in the range of 0.1 to 10; M represents one or more transition metals selected from the group Mo, W, Nb, Ta and V; subscript m falls in the range of 0.5 to 60; Z represents one or more anions selected from the group OH , F , Cl , Br , I , N3 , NO3 , ClO4 , NCS-, SCN-, PF6 , RSO3 , RSO4 , CF3SO3 , BR4 , BF4 , OAc with R = H, C1-C20-alkyl, C5-C8-cycloalkyl or aryl; subscript z falls in the range 0 to 10; subscript d represents the number of oxygen atoms necessary to balance the charge and b and c are numbers in the range 0 to 50. The oxidisation catalysts described are particularly good for activating peroxide compounds and oxygen.
Abstract:
The present invention describes a process for preparing glyoxylic acid by electrochemical reduction of oxalic acid in aqueous solution in divided or undivided electrolytic cells, characterized in that the cathode comprises from 50 to 99.999% by weight of lead and the aqueous electrolysis solution in the undivided cells or in the cathode space of the divided cells additionally contains at least one salt of metals having a hydrogen overvoltage (overpotential) of at least 0.25 V, based on a current density of 2500 A/m , and at least one mineral acid or organic acid. The process of the invention has the advantage that a highly pure, expensive lead cathode is not necessary and industrially available lead-containing materials can be used, for example alloys which, besides lead, contain at least one of the metals V, Sb, Ca, Sn, Ag, Ni, As, Cd and Cu. Periodic rinsing with nitric acid is not necessary.
Abstract:
A process for the selective oxidation of hydroxymethylpyridine derivatives of the general formula I to pyridinecarboxylic acid derivatives thereof of the formula II on nickelic hydroxide anodes is described.