Thiocyanates of rare-earth elements with tetramethylphenanthroline

Abstract

Molecular [M(NCS)₃(H₂O)(Me₄Phen)₂] · (Me₄Phen) · 0.75EtOH and anionic [H(Me₄Phen)][М(NCS)₄(Me₄Phen)₂] complexes are synthesized using thiocyanates М(NCS)₃ · 6H₂O (M = Y, Eu, Tb) and 3,4,7,8-tetramethyl-1,10-phenanthroline (Me4Phen). The complexes are characterized by IR spectroscopy and elemental, X-ray phase, and X-ray diffraction analyses (CIF files CCDC no. 1498178–1498184). The thermoanalytical study shows that the solvate molecules Me₄Phen are localized in the internal coordination sphere of the molecular complexes at 195–250°C. The magnetic behavior of the Eu and Tb complexes is governed by the nature of the Ln ion.