| 摘要 |
The invention relates to a process for preparing metal difluorochelatoborates, in which a metal bis(chelato)borate of the formula M[BL2] is reacted with boron trifluoride and a metal fluoride (MF) and/or a metal salt of the chelating ligand (M2L) where M+ is a monovalent cation selected from the group consisting of lithium, sodium, potassium and ammonium NR4+, where R═H, alkyl (C1 to C8) and L is a chelating agent having two terminal oxygen atoms and having the general formula (II), where: when m=1 and Y1 and Y2 together with C1 form a carbonyl group, n=0 or 1 and o=0 or 1 and R1 and R2 are each, independently of one another, H or alkyl having from one to eight carbon atoms (C1-C8) and Y3, Y4 are each, independently of one another, OR3 (R3═C1-C8-alkyl), then n or o≠1: p=0 or 1 and when n and o=0, p=1; or Y1, Y2, Y3, Y4 are each, independently of one another, OR3 (R3═C1-C8-alkyl), m=1, n=0 or 1, o=1 and p=0; or C2 and C3 are members of a 5- or 6-membered aromatic or heteroaromatic ring (with N, O or S as heteroelement) which can optionally be substituted by alkyl, alkoxy, carboxy or nitrile, where R1, R2, Y3 and Y4 are absent, m=0 or in the case of 1, Y1 and Y2 together with C1 form a carbonyl group and p is 0 or 1, in an organic, aprotic solvent.; |
