Structural and Magnetic Studies on Lanthanide Bis(benzoxazol‐2‐yl)methanides

Abstract We describe the syntheses, solid‐state structures, and magnetic properties of lanthanide(III)‐tris(bis(heterocyclo)methanides) [(THF)M{(NCOC 6 H 4 ) 2 CH} 3 ], with M=Tb ( 1 ), Dy ( 2 ), Ho ( 3 ), and Er ( 4 ), respectively. The corresponding lanthanide bis(trimethylsilyl)amides have been prepared as starting materials to deprotonate the neutral bis(benzoxazol‐2‐yl)methane ({NCOC 6 H 4 } 2 CH 2 ) at the central methylene bridge to generate the monoanionic ligand. In the course of this investigations the hitherto unknown holmium tris(bis(trimethylsilyl)amide) is communicated in here. X‐ray diffraction data of 1 – 4 demonstrate an almost planar ligand with metal coordination in an N , N '‐chelating fashion. Different to their d‐metal analogous the magnetic data of the f‐metal complexes presented here show no single‐molecule magnet (SMM) properties.