Metal complexes, and dishwashing products containing same

A dishwashing detergent, in particular an automatic dishwashing detergent, containing a metal complex of the general formula (I),

• (Aq+)p[Mn+Lm−](Xo−)r (I)
• wherein q is 1 or 2 and Aq+ represents a cation, selected from alkali metal cations with q 1, alkaline earth cations with q=2 and ammonium ions with q=1, Mn+ represents an aluminum ion, a transition metal ion or a lanthanoid metal ion, n is a number from 1 to 5, L represents a ligand of formula
• in which each R independently of each other is OH or O−, m represents a number from 0 to 2, Xo− represents an anion selected from F−, Cl−, Br−, I−, OH−, HSO3, SO32−, SO42−, HSO4−, NO2−, NO3−, PO43−, HPO42−, H2PO4−, BF4−, PF6−, ClO4−, acetate, citrate, formate, glutarate, lactate, malate, malonate, oxalate, pyruvate, tartrate, methane sulfonate, methyl sulfate, p-toluene sulfonate, p-toluene sulfate and succinate, and o is a number from 1 to 3, and p and r independently of each other represent a number from 0 to 4, with the proviso that the sum of n and the product of p and q is equal to the sum of m and the product of r and o.

A use of a metal complex of the general formula (I),

• (Aq+)p[Mn+Lm−](Xo−)r (I)
• wherein q is 1 or 2 and Aq+ represents a cation, selected from alkali metal cations with q=1, alkaline earth cations with q=2 and ammonium ions with q=1, Mn+ represents an aluminum ion, a transition metal ion or a lanthanoid metal ion, n is a number from 1 to 5, L represents a ligand of formula
• in which each R independently represents OH or O−, m represents a number from 0 to 2, Xo− represents an anion selected from F−, Cl−, Br−, I−, OH−, HSO3−, SO32−, SO42−, HSO4−, NO2−, NO3−, PO43−, HPO42−, H2PO4−, BF4−, PF6−, ClO4−, acetate, citrate, formate, glutarate, lactate, malate, malonate, oxalate, pyruvate, tartrate, methane sulfonate, methyl sulfate, p-toluene sulfonate, p-toluene sulfate and succinate, and o represents a number from 1 to 3, and p and r represent, independently of one another, a number from 0 to 4, with the proviso that the sum of n and the product of p and q is equal to the sum of m and the product of r and o, or of a dishwashing detergent containing such a complex in an automatic dishwashing method for removing soiling.

An automatic dishwashing method in which a metal complex of the general formula (I),

• (Aq+)p[Mn+Lm−](Xo−)r (I)
• in which q represents 1 or 2 and Aq+ represents a cation selected from alkali metal cations where q=1, alkaline earth cations where q=2, and ammonium ions where q=1, Mn+ represents an aluminum ion, a transition metal ion or a lanthanide metal ion, n represents a number from 1 to 5, L represents a ligand of the formula (II),
• in which each R independently represents OH or O−, m represents a number from 0 to 2, Xo− represents an anion selected from F−, Cl−, Br−, I−, OH−, HSO3, SO32−, SO42−, HSO4−, NO2−, NO3−, PO43−, HPO42−, H2PO4−, BF4−, PF6−, ClO4−, acetate, citrate, formate, glutarate, lactate, malate, malonate, oxalate, pyruvate, tartrate, methane sulfonate, methyl sulfate, p-toluene sulfonate, p-toluene sulfate and succinate, and o represents a number from 1 to 3, and p and r represent, independently of one another, a number from 0 to 4, with the proviso that the sum of n and the product of p and q is equal to the sum of m and the product of r and o, or a dishwashing detergent containing such a complex is used.