Synthesis, crystal structure, and magnetism of a binuclear Cu(II) complex with a single end-to-end bridged azido ligand

摘要

A binuclear copper(II) complex, [Cu_2(mu_(1,3)-N_3)(N_3)(pmp)_2(ClO_4)]ClO_4 (pmp = 2-((pyridin-2-yl) methoxy)-l,10-phenanthroline), was synthesized with a single azide as end-to-end bridge ligand, and pmp and perchlorate as ligands. In the crystal, Cu(II) is in a distorted square pyramidal geometry, and a single azide bridges equatorial-axial linking two Cu(II) ions with separation of 5.851 A. There are pi-pi stacking interactions involving 1,10-phenanthroline rings. The variable-temperature (2-300 K) magnetic susceptibilities were analyzed using a binuclear Cu(II) magnetic formula and it indicates that there is a very weak-ferromagnetic coupling with 2J=2.82 cm~(-1)..