No abstract

The title compound, poly[propane-1,3-diaminium hexa-mu-oxido-dioxidotellurium(IV)divanadium(V)], (C3H12N2)[V2O8Te] or (H2pn)[V2TeO8] (pn is propane-1,3-diamine), contains a two-dimensional anionic layer and the diprotonated pn cation for charge compensation. The anionic layer consists of pyrovanadates and [TeO3] pyramids, which are linked alternately through corner-sharing to form a one-dimensional chain. These one-dimensional chains are crosslinked through two weak Te-O bonds, constructing an anionic layer. Hydrogen bonds are observed involving the diprotonated pn cation and the O atoms of the anionic framework.

A new organically templated vanadium tellurite, poly[2,2'-iminodiethanaminium [hexa-mu2-oxido-tetraoxidoditellurium(IV)divanadium(V)] dihydrate], {(C4H15N3)[Te2V2O10].2H2O}n, features the interconnection of distorted [VO5] trigonal bipyramids by bridging [TeO3] pyramids, leading to a two-dimensional corrugated anionic layer with an interlayer distance of about 13.47 A. The interlayer space is occupied by doubly protonated diethylenetriamine cations (H2dien) and guest water molecules. The two terminal amino groups of H2dien are protonated, while the middle amino group, located on a twofold rotation axis, is not protonated. All the three amino groups and water molecules are involved in hydrogen-bonding interactions. The compound represents a new member in the series (H2am)[(VO2)(TeO3)]2.xH2O, where H2am represents a doubly protonated diamine. Similarities and differences between the structures of members of the series are discussed.

Key indicators: single-crystal X-ray study; T = 293 K; mean (C-C) = 0.003 Å; R factor = 0.033; wR factor = 0.087; data-to-parameter ratio = 11.5.In the title compound, [Co(C 6 H 6 N 4 ) 2 (H 2 O) 2 ](C 16 H 8 O 8 ), the Co II cation and the organic anion occupy different crystallographic inversion centres and, as a consequence, the asymmetric unit comprises two half-molecules. The benzene groups are coplanar. The four coordinating N atoms of the two bidentate biimidazole ligands define the equatorial plane of a slightly distorted octahedral CoO 2 N 4 geometry, and the water O atoms lie in the axial coordination sites. Translational (a,b) and inversion-related symmetry operations link the Co complex molecules and the negatively charged carboxylate anions via intermolecular N-HÁ Á ÁO and O-HÁ Á ÁO hydrogen bonds into sheets parallel to (101). The coordinated water molecules connect the sheets through O-HÁ Á ÁO hydrogen bonds, forming a three-dimensional framework. In addition, two intramolecular O-HÁ Á ÁO hydrogen bonds are observed between the carboxyl and carboxylate groups. Related literature ExperimentalCrystal data [Co(C 6

In this paper, a novel l‐glutamate based immobilized chiral ionic liquid (SBA‐IL (Glu)) was prepared by chemical bonding method and applied as a solid sorbent for chiral separation of amlodipine. The performance of SBA‐IL (Glu) was investigated for the absorption of (S)‐amlodipine and separation of amlodipine enantiomer. The static experiment showed that equilibrium adsorption was achieved within 80 minutes, and the saturation adsorptions capacity was 12 mg/g. The complex was then packed in a glass chromatographic column for the separation of amlodipine and the enantiomeric excess (%ee) of (S)‐amlodipine reached 24.67%. The immobilized ionic liquids exhibit good reusability, and the separation efficiency remains 18.24% after reused five times, which allows potential scale‐up for the chiral separation of amlodipine.