Synthesis, crystal structures and thermogravimetric analyses of Mn(II) and Cu(II) complexes derived from 1, 4, 5, 6-tetrahydro-6-oxo-3-pyridazinecarboxylic acid

摘要

Two Cu(II) complexes: [Cu(topca)_2]·2H_2O, [Cu(topca)2]·4H2O, and two Mn(II) complexes: {[Mn(topca)(H_2O)_3](topca)·2H_2O}_n and {[Mn(topca)(H2O)_3](ClO_4)}_n (where Htocpa = 1,4,5,6-tetrahydro-6-oxo-3-pyridazinecarboxylic acid), have been synthesised and their structures determined. The Cu(II) centres are four-coordinated with two pyridazinyl N atoms and two carboxyl O atoms from two ligands, while the geometry of the Mn(II) atoms is distorted octahedral with O, N atoms of two ligands and O atoms of three water molecules. The two Mn complexes are assembled in a 1-D chain structure by bridging carboxyl-O atoms.