Aqua[N-phenyl-2-(quinolin-8-yloxy)acetamide]dinitratozinc(II)

In the title complex, [Zn(NO3)2(C17H14N2O2)(H2O)], the six-coordinated Zn atom is in a distorted octahedral geometry, the donor centers being two O atoms and one N atom from the tridentate organic ligand, a water O atom and two O atoms from two monodentate nitrate ions. In the crystal, O—H⋯O hydrogen bonds between the coordinated water molecules and nitrate O atoms and N—H⋯O hydrogen bonds between the main ligand and nitrate O atoms consolidate the three-dimensional network.

In the title complex, [Zn(NO 3 ) 2 (C 17 H 14 N 2 O 2 )(H 2 O)], the sixcoordinated Zn atom is in a distorted octahedral geometry, the donor centers being two O atoms and one N atom from the tridentate organic ligand, a water O atom and two O atoms from two monodentate nitrate ions. In the crystal, O-HÁ Á ÁO hydrogen bonds between the coordinated water molecules and nitrate O atoms and N-HÁ Á ÁO hydrogen bonds between the main ligand and nitrate O atoms consolidate the threedimensional network.
Data collection: SMART (Bruker, 1997); cell refinement: SAINT (Bruker, 1997); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.  (Wu et al., 2006), the amide type ligands have been widely used to enhance the luminescent emissions of the lanthanide ions because of their excellent coordination ability (Cai & Tan, 2002). However, little work has been done on their transition metal complexes. Therefore, as part of our ongoing studies of the amide type ligands, the title complex was synthesized and characterized by X-ray diffraction.
As shown in Fig. 1, in the title complex, the six-coordinated Zn atom is in a distorted octahedral geometry with the donor centers of two O atoms and one N atom from the ligand, one O atom from one water molecule and two O atoms from two nitrate ions. The dihedral angle between phenyl ring and naphthyl ring is 22.5 (1)°.
In the crystal, O-H···O hydrogen bonds between the coordinated water molecules and nitrate O atoms, and N-H···O hydrogen bonds between the ligands and nitrate O atoms are helpful to consolidate the three-dimensional network (Fig. 2). (Wu et al., 2006;Li et al., 2005) (0.278 g, 1 mmol) was dissolved in acetonitrile (10 ml), then an acetonitrile solution (10 ml) containing zinc nitrate hexahydrate (0.295 g, 1 mmol) was added dropwise at room temperature. After stirring for 2 h, the mixture was filtered and set aside to crystallize at room temperature for 8 d, giving colorless prismatic crystals.

Refinement
Atoms H9A and H9B (water molecule O9) were located in a difference map and their positions fixed, with U iso (H) = 1.5U eq (O9). Other H atoms bonded to C and N atoms were placed in calculated positions and treated using a riding-model approximation [aromatic groups: C-H = 0.93 Å and U iso (H) = 1.2U eq (carrier C); methylene group: C-H = 0.97 Å and U iso (H) = 1.2U eq (carrier C); amine group: N-H = 0.86 Å and U iso (H2) = 1.2U eq (N2)]. Fig. 1