Yttrium and samarium complexes with a linked 1,4,7-triazacyclononane-aryloxide ancillary ligand

Abstract

The reaction of yttrium trichloride with the stoichiometric amount of the potassium salt of the 1-(3,5-di-tert-butyl-2-hydroxybenzyl)-4,7-diisopropyl-1,4,7-triazacyclononane ligand (iPr2-TACN-CH2C6H2tBu2OH) (TACN = 1,4,7-triazacyclononane) in DME affords in good yield complex [iPr2-TACN-CH2C6H2tBu2O]YCl2 (1). This complex is characterized by elemental analysis and 1H nuclear magnetic resonance; the solid state structure is determined by the single crystal X-ray diffraction analysis. In complex 1, the metal centre is six-coordinated by the aryloxide oxygen atom, the three nitrogen atoms of the TACN ligand, and two chlorine atoms. The X-ray structure of isomorphic samarium complex [iPr2-TACN-CH2C6H2tBu2O]SmCl2 (2) is also determined.