| abstract |
Complex of general formula I in which R₁, R₂ and R₃, identical or different, represent separately a linear or branched alkyl radical of 1 to 5 carbon atoms, or together with the nitrogen atom to which they are linked a heterocyclic radical having 5 to 7 atoms carbon; "alk" represents a linear or branched alkylene radical having 1 to 5 carbon atoms; R₄ to R₈, identical or different, represent hydrogen, a hydroxy, alkoxy, aryloxy, secondary or tertiary amino-primary group, or the group -alk-N ± (R₁R₂R₃) in which "alk", R₁, R₂ and R₃ have the previous meanings; M represents a transition metal such as Fe, Ru, or Os; X represents an anion and n an integer corresponding to the number of positive charges of the complex. |