Figure 1
The molecular structure and unit-cell contents of (I), showing the atom-numbering scheme and 30% probability displacement ellipsoids. Pores formed by hydrogen bonds between melaminium cations and levulinate anions are designated 0L and 0R. [Symmetry codes: (i) 1 − x, −y, 1 − z; (ii) −x, + y, − z; (iii) x, − y, + z.] |