Synthesis and crystal structure of 1,1′-bis­{[4-(pyridin-2-yl)-1,2,3-triazol-1-yl]meth­yl}ferrocene, and its complexation with Cu(I)

The title compound, [Fe(C(13)H(11)N(4))(2)], was synthesized starting from 1,1′-ferro­cene­di­carb­oxy­lic acid in a three-step reaction sequence. The di­carb­oxy­lic acid was reduced to 1,1′-ferrocenedi­methanol using LiAlH(4) and subsequently converted to 1,1′-bis­(azido­meth­yl)ferrocene in the presence of NaN(3). The diazide was treated with 2-ethynyl­pyridine under ‘click’ conditions to give the title compound in 75% yield. The Fe(II) center lies on an inversion center in the crystal. The two pyridyl­triazole wings are oriented in an anti conformation and positioned exo from the Fe(II) center. In the solid state, the mol­ecules inter­act by C—H⋯N, C—H⋯π, and π–π inter­actions. The complexation of the ligand with [Cu(CH(3)CN)(4)](PF(6)) gives a tetra­nuclear dimeric complex.