Synthesis and crystal structural characterization of an unsymmetric neodymium(III) cryptate

摘要

The complex [Nd(HL)(NO3)(H3O)]NO3 . 6H(2)O was synthesized by the 2 + 3 condensation of tris(2-aminoethyl)-amine (tren) with 2,6-diformyl-4-chlorophenol in the presence of Nd3+ as the template. The complex has been characterized by elemental analysis, molar conductivity and IR spectroscopy. The crystal structure of the complex [Nd(HL)(NO3)(H3O)]NO3 . 2MeOH has been determined. The co-ordination number of neodymium(III) is nine and its co-ordination geometry is monocapped square antiprismatic. One oxonium ion acts as a guest molecule encapsulated in the cryptate. The existence of the oxomium ion was confirmed by electrospray mass spectrometry, thermal analysis, X-ray crystal structure determination and H-1 NMR spectroscopy. [References: 29]