The title compound, [Ag(H 2 O) 2 ](C 10 H 8 NO 3 S)ÁH 2 O, has a mononuclear structure in which the Ag + cation is coordinated by two O atoms from two water molecules. The 6-aminonaphthalene-1-sulfonate anion does not coordinate to the Ag + ion, but acts as a counter-ion. Intermolecular O-HÁ Á ÁO and N-HÁ Á ÁO hydrogen bonds link the ions and water molecules. Related literatureThe related compound, [Ag(C 5 H 5 N)(H 2 O)](C 6 H 4 Cl 2 NO 3 S)Á-2H 2 O, has a mononuclear structure in which the Ag + cation is coordinated by one N atom from a pyridine molecule and one O atom from a water molecule, and the 2,5-dichloro-4aminobenzenesulfonate anion is not coordinated to Ag (Shangguan et al., 2007). ExperimentalCrystal data [Ag(H 2 O) 2 ](C 10 H 8 NO 3 S)ÁH 2 O M r = 384.15 Monoclinic, P2 1 a = 8.8780 (11) Å b = 9.0141 (11) Å c = 9.5576 (12) Å = 116.989 (2) V = 681.57 (15) Å 3 Z = 2 Mo K radiation = 1.65 mm À1 T = 292 (2) K 0.25 Â 0.23 Â 0.20 mm Data collection Bruker SMART APEX CCD diffractometer Absorption correction: multi-scan (SADABS; Sheldrick, 1996) T min = 0.652, T max = 0.718 4251 measured reflections 2177 independent reflections 1740 reflections with I > 2(I) R int = 0.052

Source of material 1-hydrogen-2-ethyl-4,5-imidazole dicarboxylate acid (0.019 g, 0.1 mmol), Co(CH 3 CH 2 COO) ⋅ 4H 2 O(0.025 g, 0.1 mmol), and NaOH (0.004 g, 0.1 mmol) were added to water (10 ml) in aTeflon-lined stainless-steel reactor. The mixture was heated at 403 K for 4d,and then slowly cooled down to room temperature. Pink block-shaped crystals of the title compound were obtained. DiscussionThe design and construction of metal-organic coodination polymers is of current interest in the field of supramocular chemistry and crystal engineering. The effective and facile approach for the synthesis of such complexes is still the appropriate choice. It is well known carboxylate ligands play an important role in coodination chemistry [1,2]. On the other hand, N-containing auxiliary ligands may tune the structures of the resultant metalorganic complexes [3][4][5][6]. The asymmetric unit of the title crystal structure consists of a1H-hydrogen-2-ethyl-4,5-imidazoledicarboxylate, aCo(II) ion and a 1,3-di(4-pyridyl)-propane. Co ion is six-coordinated by two carboxlate oxygen atoms and two Natoms of two 1H-2-ethyl-4,5-imidazoledicarboxylate and two Na toms of two 1,3-di(4-pyridyl)propane, forming ad istorted octahedron with.128(2) Å.Furthermore, CoN 4O2 octahedra are bridged by two symmetry-related bipyridyl molecules and two symmetry-related 1H-2-ethyl-4,5-imidazoledicarboxylate molecules forming aone-dimensional chain.

C 15H19Cl3Hg2N5O5,t riclinic, P1 (no. 2), a =9.922(2) Å, Source of material,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) was prepared by the literature method [1]. To a mixed solution of Hg(NO 3 ) 2 (0.2 mmol) and HgCl 2 (0.2 mmol) in ethanol (10 mL) was added with stirring asolution of the NIT-1'-MeBzIm (0.2 mmol )inethanol (10 mL). The mixture was stirred for further two hours affording acolor change from dark purple to dark black, then the reaction mixture was filtered. The filtrate was kept in ether vapor at room temperature by slow diffusion of ether into the ethanol solution of the complex. Black block-shaped single crystal were obtained.

The title compound, [Ag(C5H5N)(H2O)](C6H4Cl2NO3S)·2H2O, has a mononuclear structure in which the Ag+ cation is two‐coordinated by one N atom from a pyridine molecule and one O atom from a water molecule. The 4‐amino‐2,5‐dichlorobenzenesulfonate anion does not coordinate to the Ag atom, but acts as a counterion. Intermolecular O—H...O hydrogen bonds link the ions and water molecules.

Source of materialAn chloroform solution of 3,7,11,18,22,26-hexaazatricyclo-[26.2.2.2 13,16 ]tetratriaconta-1(31), 13(34),14,16(33),28(32),29-hexaene (0.1 mmol) was added to as olution of nickel chloride (0.2 mmol) in methanol (5 ml). Then ag reen solution was obtained. The green crystals were obtained by evaporating the solution at room temperature for several days. Experimental detailsAll hydrogen on Catoms were generated geometrically and refined as riding atoms with d(C-H) =0.93 -0.97Å and U iso(H) = 1.2 or 1.5 U eq (C). The imido group Hatoms were located from difference Fourier map and were freely refined. The atoms C15 and O1 are disordered. The disordered atoms were included in the refinement anisotropically to give occupations of about 50 %. The hydrogen atoms associated with the water molecules were not found from the difference Fourier maps. DiscussionCurrently, the molecular recognition of macrocyclic polyamines is an area of intense chemical investigation with potential applications in areas such as the designing of positively charged or electron-deficient neutral abiotic organic receptor molecules [1][2][3].Moreover, hexaaza macrocycles can form dinuclear metal complexes which in turn are capable to coordinate anions [4]. The crystal structure of the title compound is formed by discrete molecules. The nickel cation is five-coordinated by two chlorine atoms and three Na toms from the Ll igand in at etragonalpyramidal coordination. Ni1, N2, N3, Cl1 and Cl2 atoms are almost coplanar and the bond angle sum about nickel is 356.6°. Ni1-Cl1 and Ni1-Cl2 distances are 2.347(1) Å and 2.439(1) Å, respectively. The mean Ni-Ndistance in the title compound is 2.066 Å.The methanol and water molecules do not coordinate the nickel center.