Abstract

The title compound crystallizes in the centrosymmetric triclinic space group Pl (No. 2) with a = 8.7080(18) Å, b = 9.2777(14) Å, c = 10.2707(22) Å, α = 77.762(14)°, β = 77.482(17)°, γ = 84.735(15)°, V = 790.7(3) Å3 and Z = 1. The structure was solved and refined to R = 2.37% and wR = 3.19% for all 2073 independent reflections. The structure is disordered, with overlapping images of two enantiomeric [Eu(C18H18N6)(OAc)+ 2] ions surrounding an inversion center on which lies a Eu(III) cation. These two images correspond to isomers with λλ and ΔΔ conformations of their N-CH2—CH2—N moieties. The ten-coordinate europium(III) cation has a staggered 2:6:2 coordination geometry, with six equatorial Eu-N bonds to the hexadentate macrocyclic ligand and two quasi-axial Eu-O bonds to each of the two bidentate acetate ligands. Further manifestations of disorder occur for the acetate ligands and for H2O/CI− sites in the crystal lattice.

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