Dinuclear molybdenum complex and use of same in lubricating compositions

A method for stabilizing the molybdenum in a lubricating composition, the method comprising the use of a compound having the formula (I)

• R—N[(CH2)nR2][(CH2)nR3] (I)
• in which:
• R represents an alkyl, either linear or branched, comprising from 3 to 30 carbon atoms, preferably from 3 to 20, advantageously from 7 to 17 carbon atoms;
• n, being identical or different, represents 2 or 3;
• R2 and R3, being identical or different, represent a group:
• O, OR, NR′2, COOR′, or COO, where R′, being identical or different, represents a hydrogen atom or an alkali metal, or an alkaline earth metal, preferably R′ is H, preferably R2 and R3 which are identical or different, represent an OH or NH2 group.

A molybdenum protection method, in particular by means of hydrolysis, for protecting the molybdenum in a lubricating composition comprising at least one base oil, from degradation, the method comprising of the complexation of the said molybdenum in the form of a dinuclear complex with at least one compound having the formula (I):

• R—N[(CH2)nR2][(CH2)nR3] (I)
• in which:
• R represents an alkyl, either linear or branched, comprising from 3 to 30 carbon atoms, preferably from 3 to 20, advantageously from 7 to 17 carbon atoms;
• n, being identical or different, represents 2 or 3;
• R2 and R3, being identical or different, represent a group:
• O, OR, NR′2, COOR′, or COO, where R′, being identical or different, represents a hydrogen atom or an alkali metal, or an alkaline earth metal, preferably R′ is H, preferably R2 and R3 which are identical or different, represent an OH or NH2 group.