Poly[(μ-2-hydroxy-3,5-dinitrobenzoato)rubidium]

Abstract

The asymmetric unit of the title compound, [Rb(C 7 H 3 N 2 O 7 )] n , comprises an Rb + cation and a 3,5-dinitrosalicylate ligand. The Rb + cation is 10-coordinated by O atoms from eight 3,5-dinitrosalicylate anions and is linked by three 2 -O atoms, forming a zigzag chain along the b-axis direction, which is further linked by the phenyl groups, giving the threedimensional framework. The crystal structure involves intraanionic O-HÁ Á ÁO hydrogen bonds and strong -stacking interactions [centroid-centroid distance = 3.6755 (7) Å ]. Related literature ExperimentalCrystal data [Rb(C 7

Poly[bis(μ-2-amino-4-nitrobenzoato)di-μ-aqua-dirubidium]

“…These structural features, including expanded metal coordination spheres and multiple bridging with polymeric extensions, are similar to those found in other Rb salts with substituted benzoic acids, e.g. rubidium 3,5-dinitrobenzoate (8-coordinate) (Miao et al, 2011), rubidium anthranilate (7-coordinate) (Wiesbrock & Schmidbaur, 2003), rubidium salicylate (8-coordinate) (Dinnebier et al, 2002) and rubidium 3,5-dinitosalicylate (10-coordinate) (Meng, 2011), this last Rb complex being isotypic with its Cs analogue (Hu et al, 2005).…”

“…For the structures of some rubidium salts of substituted benzoic acids, see: Wiesbrock & Schmidbaur (2003); Dinnebier et al (2002); Hu et al (2005); Miao et al (2011). For the structures of caesium 4-nitroanthranilate and caesium 3,5dinitrosalicylate, see: Smith & Wermuth (2011) and Meng (2011), respectively. For the structures of the sodium and potassium 4-nitroanthranilates, see: Smith (2013).…”

Correlation of Stoichiometries for Rb+ Extraction Determined by Mass Spectrometry and Electrochemistry at Liquid|Liquid Interfaces

“…Dissolved in water, a rubidium ion typically has an inner hydration sphere consisting of 8 coordinate water molecules and this relatively high coordination number (cn) is also reflected in its ligand/complexation chemistry with typical cn range of 6–8. − Recently, Chekhlov elucidated the crystal structure of (2,2,2-cryptand)rubidium chloride and bromide such that the six oxygens and two nitrogens on cryptand were coordinated to the metal center. Interestingly, Meng reported the crystal structure of poly[(μ-2-hydroxy-3,5-dinitrobenzoato)rubidium] in which the rubidium center is coordinated to 10 oxygens from eight 3,5-dinitrosalicylate complexes with π–π stacking between these groups contributing to the stability of the compound. This is further evidence toward the viability of the ligand stoichiometry determined voltammetrically for Rb with CMPO, indicating that steric hindrance is not a issue in this case.…”