title: 4,4'-Dichloro-2,2'-(piperazine-1,4-diyldimethyl-ene)diphenol.
abstract: In the titile compound, C(18)H(20)Cl(2)N(2)O(2), the piperazine ring adopts a chair conformation. The mol-ecule has a non-crystallographic inversion centre in the middle of the piperazine ring at approximate position (3/4, 1/8, 3/8). There are intra-molecular O-H⋯N hydrogen bonds forming S(6) ring motifs. Inter-molecular C-H⋯O hydrogen bonds generate anti-parallel C(5) chain motifs propagating along the b axis, forming sheets parallel to the bc plane with a first-level graph-set S(6)C(5)R(6) (6)(26).
authors.affiliation: Division of Natural Sciences, Osaka Kyoiku University, Kashiwara, Osaka 582-8582, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Kubono
authors.forename: Yuki
authors.initials: Y
authors.lastname: Tsuno
authors.forename: Keita
authors.initials: K
authors.lastname: Tani
authors.forename: Kunihiko
authors.initials: K
authors.lastname: Yokoi