A tetranuclear pyrophosphate-bridged Cu(II) complex with 4,4′-bipyridine and 1,10-phenanthroline: Synthesis, structural, and magnetic properties

Abstract A new tetranuclear pyrophosphate-bridged Cu(II) complex with 4,4′-bipyridine and 1,10-phenanthroline [Cu 4 (phen) 4 (bpy) 2 (P 2 O 7 ) 2 ]·10H 2 O ( 1 ) has been hydrothermal synthesized and characterized by single-crystal X-ray analysis, element analysis, IR spectroscopy, TG analysis, and UV–vis spectra. Variable-temperature magnetic susceptibility measurements show the occurrence of antiferromagnetic interactions between the neighbor Cu(II) centers in 1 . The analysis of the magnetic data in the whole temperature range allows the determination of the value of the intramolecular magnetic coupling ( J  = − 13.16 cm − 1 ).