A binuclear copper(II) complex with two symmetric end-on azido bridges: ½Cu 2 ðtacnÞ 2 ðl-N 3 Þ 2 ðClO 4 Þ 2 Á CH 3 OH (1), where tacn=1,4,7-triazacyclononane, has been synthesized and structurally as well as magnetically characterized. Compound (1) has the discrete binuclear structure, bridged by two end-on N 3 ) anions. The macrocyclic ligand tacn functions as a terminal ligand. The magnetic data of compound (1) were analyzed by means of H ¼ À2JŜ 1Ŝ2 À DŜ Z , leading to J=2.49 cm )1 , g=2.08, D=±0.97 cm )1 , zJ¢ =)0.47 cm )1 . The ferromagnetic interaction is discussed on the basis of the structural features and is compared with the model structure of Ruiz.

By using the macrocyclic oxamido-copper complex CuL (H 2 L = 2,3-dioxo-5,6:13,14-dibenzo-9,10-(O)cyclohexyl-1,4,8,11-tetraazacyclo-tetradeca-7,12-diene) as precursor, two new trinuclear complexes with the formulas [(CuL) 2 Mn(ClO 4 ) 2 ] (1) and [(CuL) 2 Co(ClO 4 ) 2 ] (2) have been synthesized and structurally characterized. H-bonds are found between the molecules, which link adjacent trinuclear units together to form a unique onedimensional structure. The temperature dependence of the magnetic susceptibility for the complexes was analyzed by means of the HamiltonianĤ ¼ À2JŜ 1Ŝ2 ; leading to J = -14.66 cm -1 and J = -22.9 cm -1 for 1 and 2, respectively.

A new trinuclear Cu2Mn complex, bis­(dimethylformamide)bis­[μ‐3,10,18,21‐tetra­azatetra­cyclo[20.4.0.04,9.012,17]hexa­cosa‐2,10,12,14,16,22,24,26‐octa­ene‐19,20‐dionato(2−)]bis­(thio­cyanato)dicopper(II)manganese(II),[Cu2Mn(C22H20N4O2)2(NCS)2(C3H7NO)2], has been synthesized and structurally characterized. The CuII atom is five‐coordinated by four N atoms from the tetraza macrocycle and one dimethyl­formamide N atom. The central MnII atom is coordinated by four O atoms of the oxamide group and two N atoms. The MnII atom lies on a centre of symmetry. The CuII atoms reside in the cavities of the macrocyclic ligands.

In the title compound, [2‐phenyl‐3,10,18,21‐tetra­azatetracyclo­[20.4.0.04,9.012,17]hexa­cosa‐2,10,12,14,16,22,24,26‐octaene‐19,20‐dionato(2−)]copper(II) methanol solvate, [Cu(C34H28N4O2)]·CH3OH, the NiII atom is coordinated by four N atoms from the doubly deprotonated tetra­aza ligand, L2−, in a square‐planar coordination geometry. O—H⋯O hydrogen bonds link the complex to the methanol solvent mol­ecule.