Bisphosphorylated ligands based on isomeric <i>N,N’</i>-phenylenedibenzimidoyl dichlorides
The Arbuzov reaction of N,N’ -phenylenedibenzimidoyl dichlorides furnished new tetradentate ligands, viz., N,N’ -bis[(diphenylphosphoryl)phenylmethylidene]benzenediamines, which form complexes with lanthanides.