title: N-(4-Amino-phen-yl)-1,8-naphthalimide hemihydrate.
abstract: The title compound, C(18)H(12)N(2)O(2)·0.5H(2)O, was prepared by the reaction of 1,4-phenyl-enediamine with 1,8-naphthalic anhydride in refluxing dimethyl-formamide. The structure is stabilized by N-H⋯O and O-H⋯O hydrogen bonds. There are π-π stacking inter-actions [centroid-centroid distances of 3.718 (2), 3.510 (2) and 3.546 (2) Å] and C-H⋯π inter-actions between the mol-ecules. The water molecule lies on a twofold rotation axis. Its two H atoms are disordered equally over two positions.
authors.affiliation: New Materials and Functional Coordination Chemistry Laboratory, Qingdao University of Science and Technology, Qingdao 266042, People's Republic of China.
authors.forename: Fang-Fang
authors.initials: FF
authors.lastname: Jian
authors.forename: Li-Ming
authors.initials: LM
authors.lastname: Wang
authors.forename: Li
authors.initials: L
authors.lastname: Du
authors.forename: Jing
authors.initials: J
authors.lastname: Wang