Crystal Structure and Corrosion Inhibition Properties of Ferrocenyl- and Phenylendiamine-Iminomethylphenoxy Cobalt Complexes.
Résumé
The crystal structures of bis[2-(ferrocenyl-iminomethyl)phenoxy]cobalt(II) (CoII(L)2) [monoclinic, a 12.5466(3), b 10.6782(3), c 21.2695(6) Å, α = γ 90.°, β 92.944(2)°, V = 2845.82(13) Å3, Z = 4, space group P21/c] and bis(2-[(4-dimethylamino-phenylimino)-methyl]-phenoxy)cobalt(II) (CoII(M)2) [triclinic, a 10.2916(4), b 16.4867(10), c 17.6782(11) Å, α 114.754(2), β 96.614(4), γ 97.736(4)°, Z = 4, space group P-1] dominated by extensive hydrogen bonding such as O-H···N, N-H···O and N-H···N interactions. In both structures the central CoII is displaying a slightly distorted tetrahedral coordination sphere involving two iminoethyl-phenoxy ligands. The inhibition efficiency of the Co complexes concerning the corrosion of mild steel in acidic soln. was studied by electrochem. impedance spectroscopy. [on SciFinder(R)]