title: (Diethyl-enetriamine)bis-(theophyllinato)zinc(II) dihydrate.
abstract: In the title compound, [Zn(C(7)H(7)N(4)O(2))(2)(C(4)H(13)N(3))]·2H(2)O, the Zn(II) ion is penta-coordinated by three N atoms of the diethyl-enetriamine ligand and one N atom of each of the two theophyllinate anions in a distorted trigonal-bipyramidal geometry. The Zn-N distances range from 2.076 (3) to 2.221 (3) Å. The crystal packing is stabilized by O-H⋯O, O-H⋯N and N-H⋯O hydrogen bonds involving the theophylline and diethyl-enetriamine ligands and uncoordinated water mol-ecules.
authors.affiliation: Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, 11 Arany János Street, RO-400028 Cluj-Napoca, Romania.
authors.forename: Béla
authors.initials: B
authors.lastname: Mihály
authors.forename: Edit
authors.initials: E
authors.lastname: Forizs
authors.forename: Attila-Zsolt
authors.initials: AZ
authors.lastname: Kun
authors.forename: Ioan
authors.initials: I
authors.lastname: Silaghi-Dumitrescu