Boron chelate complexes
AssigneeChemetall GmbH
InventorsUlrich Wietelmann, Uwe Lischka, Klaus Schade, Jan-Christoph Panitz
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Abstract
Boron chelate complexes of the general formula are described, where X is either —C(R1R2)— or —C(R1R2)—C(═O)—, in which R1, R2 independently of one another denote H, alkyl (with 1 to 5 C atoms), aryl, silyl or a polymer, and one of the alkyl radicals R1 or R2 may be bonded to a further chelatoborate radical, or X denotes 1,2-aryl with up to two substituents S in the positions 3 to 6 in which S1, S2 independently of one another denote alkyl (with 1 to 5 C atoms), fluorine or a polymer, as well as M+ denotes Li+, Na+, K+, Rb+, Cs+ or [(R3R4R5R6)N]+ or H+, where R3, R4, R5, R6 independently of one another denote H or alkyl with preferably 1 to 4 C atoms.
Claims5
1-8. (canceled)
A boron chelate complex of the formula
- where X is either —C(R1R2— or —C(R1R2)—C(═O)—, R1 and R2 are independently selected from the
- group consisting of H, C1-C5 alkyl, aryl, silyl and a polymer, if R1 or R2 are alkyl they may be bonded to a chelatoborate radical,
- or X is a 1,2-aryl with up to two substituents S in the positions 3 to 6
- in which S1 and S2 are independently selected from the group consisting of a C2 to C5 alkyl, fluorine and a and polymer;
- wherein M+ is selected from the group consisting of Li−, Na−, K+, Rb+, Cs+, [(R3R4R5R6)N]− and H+, wherein R3, R4, R5, and R6 are independently H or alkyl.
A boron chelate complex according to claim 1, wherein the boron chelate complex is selected from the group consisting of hydrogen-(malonato, oxalato) borate, hydrogen-(glycolato, oxalato) borate, hydrogen-(lactato, oxalato) borate, hydrogen-(oxalato, salicylato) borate, bis-[hydrogen-(oxalato, tartrato) borate, or a lithium, caesium or tetraalkylammonium salt of the boron chelate complex.
A method for the production of a boron chelate complex according to claim 1, comprising the steps of reacting at least one of boric acid or a boron oxide with oxalic acid and a chelate-forming agent H—O—X—(CO)—O—H.
The method of claim 3, further comprising adding an oxidic alkali metal source or an ammonium salt.
Dependencies are inferred from the claim text.