Synthesis and characterisation of ruthenium(ii) complexes containing ferrocenyl-derived ligands

Ruthenium(II) complexes containing the macrocycle [14]aneS(4) and pyridyl ligands with an end-capping ferrocene were prepared using [Ru([14]aneS4) ( DMSO) Cl] Cl as the starting material. Substitution of the DMSO ligand by 4-ferrocenylpyridine (4-FP), ferrocenyl-4-pyridylacetylene (FPA) and pyridine (py) gave the complexes [Ru([14]aneS(4))(L)Cl]Cl (L = 4-FP, FPA, py). The acetonitrile complex [Ru([14]aneS(4))(NCMe)(2)](BF4)(2) was also prepared starting from [Ru([14]aneS(4))(DMSO)Cl]Cl. UV/Vis absorption spectroscopy and cyclic voltammetry indicate low electronic communication between the metal centres in the heterobimetallic complexes. The crystal structure of [Ru([14]aneS(4))(4-FP)Cl]Cl was determined by X-ray diffraction. Crystal data: C25.780H37.134Cl2FeNO1.288S4Ru, M = 737.82, monoclinic, space group P2/n, a = 13.192(1), b = 7.6662(6), c = 28.549(2) A, beta = 100.341(2)degrees, V = 2840.4(4) Angstrom(3), Z = 4.