1Faculty of Chemistry, University of Tehran, P.O. Box 14155-6455 Tehran, I.R. IRAN
2Department of Chemistry, Shahid Bahonar University, Kerman, I.R. IRAN
The structure of N,N'-bis(2-hydroxybenzylidene)-2,2-dimethyl-1,3-propanediamine, C19H22N2O2, has been studied at low temperature (120K) by means of single-crystal X-ray diffraction. Solving the structure shows an orthorhombic unit cell, with P212121 space group, Z = 4, a = 6.1046 (4) Å, b = 15.8349 (11)Å, c = 17.2898 (12) Å and V = 1671.3 (2) Å3. There are two relatively strong hydrogen bonds (average O—H···N, 2.59 Å), involving the hydroxyl group and the nearest N atom of the imine groups is an indicative of intra-molecular hydrogen bonding within each salicylideneimine moiety. C-H…π interactions connect the neighboring molecules together, stabilizing the crystal network. No significant p-p interactions are present in the crystal structure.
 Carey F.A., "Organic Chemistry", 5th ed.,New York, McGraw-Hill, (2003).
 Sonmez M., Levent A., Sekerci M., Oxidative Dehydrogenation of Cu(II) Complexes with N-Aryl-N-2- Hydroxybenzyl- and N-Aryl-N-2-Hydroxynaphthylmethyleneamine Derivatives, Russ.J. Coord. Chem., 30, p. 655 (2004).
 Khandar A.A., Nejati K. , Rezvani Z., Synthesis, Characterization and Study of the Use of Cobalt (II) Schiff-Base Complexes as Catalysts for the Oxidation of Styrene by Molecular Oxygen, Molecules10, p. 302 (2005).
 Gusel'nikov L.E., AvakyanV.G., Guselnikov S.L., Effect of Geminal Substitution at Silicon on 1-Sila- and 1,3-Disilacyclobutanes' Strain Energies, Their 2+2 Cycloreversion Enthalpies, and Si=C π-Bond Energies in Silenes, J. Am. Chem. Soc. 124, p. 662 (2002).
 Aydogan F., Ocal N., Turgut Z., Yolacan C., Transformations of Aldimines Derived from Pyrrole- 2- Carbaldehyde. Synthesis of Thiazolidino-Fused Compounds, Bull. Korean Chem. Soc., 22, p. 476 (2001).
 Calligaris M., Randaccio, M., "Schiff Bases as Acyclic Polydentate Ligands, in Comprehensive Coordination Chemistry", 2, Wilkinson G., ed, Pregmon Press, (1987).
 Yamada S., Advancement in Stereochemical Aspects of Schiff Base Metal Complexes, Coord. Chem. Rev., 190, p. 537 (1999).
 Garnovskii A.D., Vasil Chenko I.S., Rational Design of Metal Coordination Compounds with Azomethine Ligands, Russ. Chem. Rev., 71, p.943 (2002).
 Garnovskii A.D., Nivorozhkin A.L., Minkin V.I., Ligand Environment and Structure of Schiff Base Adducts and Tetracoordinated Metal-Chelates, Coord. Chem. Rev., 126, p.1 (1993).
 Corden J.P., Errington W., Moore P., Wallbridge M.G.H., N,N'-Bis(2-Hydroxybenzylidene)-2,2-Dimethyl-1,3-Propanediamine, Acta Cryst., C52, p. 125 (1996).
 Flack H.D., On Enantiomorph-Polarity Estimation, Acta Cryst.,A39, p. 876 (1983).
 a) "Bruker SAINTPlus Data Reduction and Correction Program", v. 6.01, Bruker AXS, Madison, Wisconsin, USA(1998).
b) "Bruker SMART. Bruker Molecular Analysis Research Tool", v. 5.059. Bruker AXS, Madison, Wisconsin,USA(1998).
 Sheldrick G.M., SHELXS97and SHELXL97.University of Göttingen,Germany (1997).