SYNTHESES, PROPERTIES AND CRYSTAL AND MOLECULAR STRUCTURES OF THE COMPLEXES OF LANTHANIDE THIOCYANATES WITH 1,8-NAPHTHO-16-CROWN-5
WANG GENGLIN YAN SHIPING YAO XINKAN (Department of Chemistry, Nankai University, Tianjin )
Complexes formed from lanthanide thiocyanates (except Pm, Tm and Lu) and 1,8-naphtho-16-crown-5 have been synthesized and characterized by elemental analyses, IR spectra, TG-DTA and electrical conductivity measurements. A single crystal structural analysis for the complex of Er(NCS)_3 with 1,8-naphtho-16-crown-5 has been performed. The result shows that Er(Ⅲ) ion is coordinated simultaneously by five oxygen atoms of the crown ether and three nitrogen atoms of thiocyanates. The coordination number of Er(Ⅲ) ion is eight.