Synthesis And Crystal Structure Of A New Oxamidato-Bridged Trinuclear (Cu2mnii)-Mn-Ii Complex Containing A Macrocyclic Ligand

A new oxamidato-bridged trinuclear complex [(CuL)(2)Mn](ClO4)(2) (H2L=2,3-dioxo-5,6,14,15-dibenzo-1,4, 8,12-tetraazacyclo-pentadeca-7,3-dien)] was prepared and its structure determined. The complex is monoclinic, space group P2(1)/n, with a = 10.625(3), b = 11.602(3), c = 16.020(5) Angstrom, beta = 91.031(5)degrees, Z = 2; it was refined to R1 = 0.0555. In the solid state, the structure consists of centrosymmetric [(CuL)(2)Mn](2+) cations separated by perchlorate anions; the central manganese atom is four coordinated with square planar geometry.