Figure 1
A perspective view of an asymmetric unit and selected neighbors of (I). Displacement ellipsoids are drawn at the 50% probability level. Na⋯O contacts longer than 2.7 Å are shown as broken lines. [Symmetry codes: (i) −x, y, − z; (ii) − x, − y, 1 − z; (iii) x, 1 − y, + z; (iv) − x, + y, − z.] |