Ming-Ming Yu

Synthesis, crystal structure, and magnetism of a two-dimensional copper(II) complex with single end-to-end and double end-on azide bridges

A new azido-bridged copper(II) complex, [Cu(dmp)(µ 1,1-N3)(µ 1,3-N3)] n (1) (dmp = 3,5-dimethylpyrazole), has been structurally and magnetically characterized. X-ray diffraction analysis indicates that the compound consists of double end-on (EO) azido-bridged dimers which are linked by single end-to-end (EE) azide bridges to form a 2-D layer-like structure. Magnetic investigation demonstrates an overall ferromagnetic interaction in 1 and both azide bridges (EE and EO) transmit ferromagnetic coupling. At low temperature (T < 2.5 K), the compound exhibits some metamagnetic behavior.

A three-dimensional polymeric mixed-valence copper complex: poly[tri-μ-azido-μ-di-2-pyridyl­diazene-dicopper(I,II)]

The title complex, [Cu2(N3)3(C10H8N4)]n, shows a three-dimensional poylmeric structure. Each Cu atom is surrounded by five N atoms from three bridging azide ligands and one di-2-pyridyldiazene ligand [Cu—N = 2.002 (5), 2.317 (6), 2.020 (4), 1.995 (5) and 1.985 (3) A], forming a CuN5 trigonal bipyramid. One μ1,1-azide bridges two Cu atoms and the other two μ1,1-azides bridge pairs of Cu atoms, forming a —Cu—N—Cu—N2— chain. The di-2-pyridyldiazene bridges two Cu atoms of different —Cu—N—Cu—N2— chains, forming a three-dimensional polymeric structure. On the basis of charge equilibrium, the presence of one CuII and one CuI ion are deduced and the two ions are disordered because of the occurrence of only one unique Cu atom in the structure.

Dicyanato­bis(1,10-phenanthroline)manganese(II)

In the title compound, [Mn(NCO)2(C12H8N2)2], the Mn atom, on a twofold rotation axis, is chelated by the two phenanthroline ligands, with two cyanate groups in cis positions.