Patent ID: 6852843

Claim:
A complex dilithium salt of the formula II: wherein R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of a hydrogen atom, a saturated and unsaturated straight chained, branched and cyclic hydrocarbyl radical which are unsubstituted or substituted by one or more substituents selected from the group consisting of a halogen atom and a C 1-6 alkyl radical; and each R 5 is independently selected from the group consisting of radicals selected from the group consisting of saturated and unsaturated straight chained, branched and cyclic hydrocarbyl radicals; radicals of the formula Si(R 6 ) 3 wherein each R 6 is independently selected from the group consisting of saturated or unsaturated straight chained, branched or cyclic hydrocarbyl radicals, radicals of the formula III: wherein R 9 , R 10 , R 11 and R 12 are independently selected from the group consisting of a hydrogen atom, a fluorine atom, a NO 2 radical, a C 1-6 alkyl radical, and a C 8-12 aryl radical and E is an endocyclic nitrogen atom or a C—CN group.