TECHNICAL DESCRIPTION

The aim of this invention is to provide a complex able to form an adduit with a salt, the aforementioned adduit having a nucleophilic anion part and being soluble in polar solvents aprotic.

The invention rests primarily on the fact that, in an unexpected way, complexes formed by an acid of Lewis derived from boron or aluminum are able to form complexes with an anion Z chosen among F (‘), OCN (‘), O (2 ‘), O [2] (2 ‘), O [2] (‘ ‘), OH (‘), RO (‘), RN (2’) ‘R [2] NR (‘) and CN (‘), HNCN (‘1) NCN (2′) and NR (3’) of a salt whose cation can be an alkaline cation.

It relates to boron or aluminum complexes, to the preparation thereof, and to the use thereof for solubilizing ion components. The complexes have one of the following formulas: (I, II, III, IV, V, and VI) wherein D is B or Al; R1 is R, RF, NO2, CN, C(=O)OR, RSO2, or RFSO2; X1, X2, X3, and X4 each is a divalent group >C=O, >C=NC N, >C=C(C N)2, >CR2R3, or >SO2; Y1, Y2, and Y3, each is a divalent group -O-, >N(C N), >N(CORF), >N(SO2R4), >NR4, >N(COR4), or >N(SO2RF); R1, R2, and R3, each is H, an alkyl group, an aryl group, an alkylaryl group, an arylalkyl group, an oxaalkyl group, or an alkenyl group; R4 is an alkyl group, an aryl group, an alkylaryl group, a heteroaryl group, an arylalkyl group, an oxaalkyl group, an alkenyl group, or an RFCH2 group; RF is a perfluoroalkyl group, partially fluoridated alkyl group, or a partially or totally fluoridated phenyl group; each of groups R’2 and R’3 is R or F.

INDUSTRIAL APPLICATIONS

These boron/aluminum complexes allow the solubilization of ion components which could have various uses, particularly as additives of lithium battery electrolytes to increase their solubility.

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