Lanthanide complexes of a new tetradentate nitrogen donor and their applications in organic synthesis

489-493Isatoic anhydride reacts with propylenediamine to form N,N¢-propylene-bis-(2-aminobenzamide) [PBAB]. The reaction between PBAB and lanthanide chlorides (Lanthanides =La, Ce, Pr, Sm, Eu, Dy, Yb, Lu) yields 1: 1 complexes. The ligand PBAB and the complexes have been characterised by elemental analyses, IR, 1H NMR, electronic spectral, magnetic, conductance and thermal studies. The complexes are found to catalyse the bromination of arenes by molecular bromine stereospecifically