Crystal structure of triaquabis(vanillin-O,O)nitritoerbium(III), Er(C8H7O3)2(NO2)(H2O)3

Abstract

Source of materialAdamantaneamine (2.0 mmol) in 15.0 ml CH 3OH was added to a solution of Er(NO 3)3 · 5H2O (1.0 mmol) dissolved in 10.0 ml CH 3OH, producing a colorless solution, to which 2.2 mmol vanillin was added under continuous stirring. The mixture was then further stirred for 5 h. Slow evaporation afforded the title complex crystals for the X-ray structure determination. DiscussionThe crystal structure of the title compound is built up by triaquabis(vanillin-O,O¢)nitritoerbium(III) complex molecules, within which the Er atoms are each surrounded by four O atoms from two vanillin ligands, three H 2O molecules and one O atom of nitrito ligand, to which nitrato group was reduced by adamantaneimine. The geometry around Er atom can be described as a distorted square antiprism with O1, O7, O7a, O1a (plane I) and O2, O4, O2a, O6 (plane II) (symmetry code: a: x, -y+1/2, z) at the tetragonal bases (dihedral angle between their mean planes is 3.3(1)°). The distances between Er and the two planes are -1.075(2) Å and 1.344 (2)