Tris (2-pyridylmethyl)triazacyclododecane complexes of Fe-II and Cu-II

The title complexes, [1,5,9-tris(2-pyridylmethyl)1,5,9- triazacyclododecane -kappa(3)N] iron(II) tetrachloroferrate, [Fe(C27H36N6)][FeCl4], and [1,5,9- tris(2-pyridylmethyl)-1,5,9-triazacyclododecane-kappa(3)N]copper(III) bis(h exafluorophosphate) acetonitrile hemisolvate, [Cu(C27H36N6)](PF6)(2). 0.5CH (3)CN, differ significantly in their conformations. The iron complex is nea r-octahedral with Fe-N distances of 2.257 (5) (ring) and 2.226(5)Angstrom ( pyridine), and fused chelate rings predominately in the boat form. The copp er complex is tetragonally distorted, with four shorter and two longer Cu-N bonds [2.049(6)-2.199(7) and 2.280 (6)-2.473 (7) Angstrom, respectively]; its chelate rings are disordered in boat, chair and skew forms.