Synthesis and Spectroscopic Studies of Metal Complexes of N,N′‐p‐Phenylenedimethylenebis(pyridin‐4‐one) with d‐ and f‐Block Metal Ions

Abstract The preparations are reported for a range of complexes of the ligand N,N′‐p‐phenylenedimethylenebis(pyridin‐4‐one) (XBP) with the d‐block ions Mn(II) to Zn(II) and also with Cd(II), Y(III), and the lanthanide ions. Relevant solid state EPR, electronic and far‐IR spectra are reported and interpreted in terms of the metal ion coordination geometries and, where appropriate, the likely long‐range polymeric structures of the compounds. The value of the zero‐field splitting (zfs) parameter, D = 0.069 cm−1, obtained from the S = 1 type EPR spectrum of the compound {[Cu2(XBP)3(NO3)2](NO3)2 · 2H2O} n is compared with those of other compounds involving discrete Cu · Cu dimer interaction. The results of luminescence measurements on the complexes of Sm(III), Eu(III), Tb(III), and Dy(III) are also given.