Figure 2
(a) The crystal structure of the [Er(Htmpa)4(H2O)]− anion of 1, with the relevant atoms labelled. Light-gray dotted lines indicate the CH3⋯π interactions. Displacement ellipsoids are drawn at the 50% probability level. (b) The coordination sphere around the Er atom, showing its capped antiprismatic coordination geometry. H atoms have been omitted for clarity. C, O and N atoms are coloured in gray, red and blue, respectively. |