Crystal structure of diaqua-[4,4′-(m-xylylenebis(imino))dibenzoato]-disilver(I), Ag2(H2O)2(C22H18N2O4)

C11H11AgNO3, monoclinic, C12/c1 (no. 15), a = 23.475(2) Å, b = 7.2526(3) Å, c = 13.3800(7) Å, ) = 93.161(5)°, V = 2274.6 Å, Z = 8, Rgt(F) = 0.038, wRref(F) = 0.055, T = 293 K. Source of material A mixture of 1,3-benzendialdehyde (1.34 g, 10 mmol) was dissolved in MeOH (50 mL), and 4-aminobenzoic acid (2.74 g, 20.mmol) in 50 mL MeOH was added dropwise over 30 min. The reaction mixture was stirred for 2 h and the powdery yellow precipitate was obtained. The precipitate was suspended in 100 mL MeOH at RT and 1.6 g NaBH4 was added during a period of 30.min and the clear reaction mixture was obtained and filtered. The clear filtrate was diluted with 30 mL water and then acidified with cold dilute HCl solution until the precipitate didn’t produce when pH = 5. The powdery white precipitate was filtered, washed with water for three times and dried for 24 h under vacuum. A mixture of Ag2CO3 (0.028 g, 0.1 mmol), H2L (0.038 g, 0.1 mmol) in ethanol (10 mL) was stirring for 30 min at room temperature. The mixture was dissolved by dropwise addition of ammonia (5 M). Suitable colorless single crystals were obtained by slow evaporation of the solution at room temperature (yield 80 % based on Ag2CO3). Experimental details All H atoms on C atoms were generated geometrically and refined as riding with d(C—H) = 0.93 0.97 Å and Uiso(H) = 1.2 Ueq(C). The H atoms bound to N and to water oxygen are found in the different Fourier map and refined with Uiso(H) = 1.2 Ueq(N) and Uiso(H) = 1.5 Ueq(O), respectively. Discussion The current interest in polymeric coordination networks is rapidly expanding not only for their potential applications in hostguest chemistry, ion exchange, gas storage, and nonlinear optics, but also for their intriguing variety of structures [1,2]. Each Ag(I) is three-coordinated by one Ag (Ag1A) ion and two O (O2, O1W) atoms, one of which from ligand and one from coordinating H2O molecule in a twisted T-shaped conformation. There is a Ag1-Ag1A interaction with a Ag1—Ag1A distance of 3.1512(7). Å, which is shorter than the van der Waals contact distance for Ag···Ag of 3.40 Å, therefore, a Ag—Ag bond exists between two silver cations. Each anion is coordinated to two Ag(I) ions. The Ag(I) ions are linked by ligands to form an infinite chain structure. Z. Kristallogr. NCS 225 (2010) 205-206 / DOI 10.1524/ncrs.2010. 0088 205 © by Oldenbourg Wissenschaftsverlag, München Crystal: colorless block, size 0.11 × 0.14 × 0.17 mm Wavelength: Mo K+ radiation (0.71073 Å) . : 17.62 cm−1 Diffractometer, scan mode: Oxford Diffraction Gemini R Ultra, % 2,max: 58.42° N(hkl)measured, N(hkl)unique: 5643, 2645 Criterion for Iobs, N(hkl)gt: Iobs > 2 ((Iobs), 1106 N(param)refined: 158 Programs: SHELXS-97 [3], SHELXL-97 [4] Table 1. Data collection and handling. H(1) 8f 0.3904 −0.4665 0.1377 0.066 H(2) 8f 0.4238 −0.7202 0.0518 0.069 H(4) 8f 0.3397 −0.5375 −0.1971 0.060 H(5) 8f 0.3101 −0.2881 −0.1115 0.059 H(8A) 8f 0.4219 −1.0258 −0.0566 0.075 H(8B) 8f 0.4724 −0.8835 −0.0510 0.075 H(10) 8f 0.4537 −1.3016 −0.1298 0.073 H(11) 4e 1⁄2 −1.4564 3⁄4 0.075 H(12) 4e 1⁄2 −0.8258 3⁄4 0.071 H(1A) 8f 0.272(2) 0.524(7) 0.190(4) 0.12(2) H(1B) 8f 0.216(2) 0.487(6) 0.113(3) 0.12(2) H(1N) 8f 0.388(2) −0.815(6) −0.194(3) 0.05(1) Table 2. Atomic coordinates and displacement parameters (in Å). Atom Site x y z Uiso