A Series of Umbrella‐Shape Copper‐Lanthanides Based Mixed Metallic Coordination Complexes

Abstract A series of six hetero‐bimetallic complexes having umbrella shape topology and general formula (L) 2 CuLn(NO 3 )(Ph 3 PO) have been synthesized by reacting a methanolic solution of diprotic ligand (H 2 L) [(E)‐2‐(((2‐hydroxyphenyl)imino)methyl)‐6‐methoxyphenol] and co‐ligand Ph 3 P=O with CuCl 2 .2H 2 O and Ln(NO 3 ) 3 ⋅6H 2 O (Ln= Gd( 1 ), Tb( 2 ),Dy( 3 ), Ho( 4 ), Er( 5 ) and Y( 6 )) in the presence of triethylamine base. The iso‐structural complexes ( 1 ‐ 6 ) have been characterized by Single crystal XRD measurement. Elemental analysis, EPR, IR and UV/Vis spectra have been recorded to further characterise these complexes. The direct current (dc) and alternating current (ac) magnetic susceptibility measurements has been carried out to study magnetic properties of the complexes. Thermogravimetric analysis (TGA) has also been done to assess thermal stability of the complexes.