Coordination properties of the 1,1 '- bis[((6-methyl)-2-pyridyl)amido]ferrocene ligand towards group 11 complexes

The coordination properties of the 1,1'-bis[((6-methyl)-2-pyridyl) amido] ferrocene ligand (L) towards group 11 and palladium complexes have been studied. L coordinates as the bridging ligand, through the pyridinic nitrogen atoms, when reacting with the gold(I) compounds [Au(OTf)(PPh(3))] and [Au(C(6)F(5))(tht)] or with the gold(III) species [Au(C(6)F(5))(3)(tht)] leading to linear or square planar derivatives, respectively. The reaction of L with [O(AuPPh(3))(3)]ClO(4) affords the tetranuclear compound [Au(4)(L-H)(2)(PPh(3))(4)](ClO(4))(2) in which the amide groups have been deprotonated and the ligand acts as dianionic, N, N, N, N-tetradentate. The treatment of the ligand L with silver salts leads to mononuclear complexes with the ligand acting as N, N, O or N, N chelating in [AgL]OTf, or [AgL(2)]OTf, or to dinuclear species with an N, N bridging ligand in [Ag(2)(PPh(3))(2)(mu-L)](OTf)(2). Tetracoordination around the copper atom is proposed for the copper complexes [CuL(PPh(3))(2)] PF(6), [CuL]PF(6), or [CuL(2)]PF(6) with the ligand coordinated in an NH, NH, N, N or an N, N chelating fashion. Finally the palladium compound [PtCl(2)L] has been synthesized with a trans-chelating ligand. In the structures of some of these derivatives the presence of secondary interactions such as weak hydrogen bonds of the type C-H center dot center dot center dot O, C-H center dot center dot center dot N or C-H center dot center dot center dot X (X = F, Cl) or even M center dot center dot center dot O interactions leads to supramolecular networks.