Fig. 7: Molecular structure of 8 at 150 K and displacement ellipsoids set to 40%.

Nonamide hydrogen atoms and lattice solvent are omitted for clarity. Selected bond lengths (Å): U1-N1, 2.236(5); U1-N2, 2.221(5); U1-N3, 2.246(4); U1-N4, 2.645(5); U1-N5, 2.578(5); B1-N5, 1.637(9).