Transition metal complexes of 2-amino-3,5-dihalopyridines: Synthesis, structures and magnetic properties of Cu(3,5-diCAP)_2X_2 and Cu(3,5-diBAP)_2X_2

摘要

A family of bis(2-amino-3,5-dihalopyridine)dihalocopper(II) compounds has been synthesized, including (3,5-diCAP)_2CuCl_2 (1), (3,5-diCAP)_2CuBr_2 (2), (3,5-diBAP)_2CuCl_2 (3), and (3,5-diBAP)_2CuBr_2 (4) [3,5_diCAP = 2-amino-3,5-dichloropyridine; 3,5-diBAP = 2-amino-3,5-dibromopyridine]. These complexes have been analyzed through single crystal X-ray.diffraction and temperature dependant magnetic sus_ceptibility. The compounds are all isostructural, forming bi-bridged chains with long Cu-X__Cu bridges in the crystal lattice. The two copper chloride compounds (1 and 3) exhibit weak antiferromagnetic inter_actions along these chains.