A Dihalide–Decahydrate Cluster of [X₂(H₂O)₁₀]^2– in a Supramolecular Architecture of {[Na₂(H₂O)₆(H₂O@TMEQ[6])]·2(C₆H₅NO₃)}X₂(H₂O)₁₀ (TMEQ[6] = α,α′,δ,δ′-Tetramethylcucurbit[6]uril; X = Cl, Br)

Abstract

α′,δ,δ′-tetramethylcucurbit[6]uril; X = Cl (1), Br ( 2)). Its structure can be viewed as a connection of two [X(H 2 O) 3 ] − clusters with a uudd water tetramer through hydrogen-bonding interactions.

Structures and Spectra of Halide Hydrate Clusters in the Solid State: A Link between the Gas Phase and Solution State

“…Wang and co‐workers reported [X 2 (H 2 O) 8 ] 2− (X=Cl, Br) and [I 2 (H 2 O) 10 ] 2− clusters, but they also more correctly also refer to them as motifs since they form part of 2D or 3D networks, and they also have classical hydrogen bonds with the cations [51] . Long and co‐workers claimed “discrete” [X 2 (H 2 O) 10 ] 2− (X=Cl, Br) clusters, however, these contain OH 2 −O=C and ROH−OH 2 hydrogen bonds as well as hydrogen bonds with water ligands on Na + ions [52] . Larger clusters, with more water, are most likely to form a polymeric structure rather than isolated clusters.…”

A fluorophore-labelled copper complex: crystal structure, hybrid cyclic water–perchlorate cluster and biological properties

“…Recently, the recognition of hydrated forms of anions has attracted a great deal of attention due to their role in many chemical, environmental and biological processes (Chen et al, 2013;Mascal et al, 2006). Inorganic anions are familiar in nature and take part in natural processes occurring in water (Ohmine & Saito, 1999;Ludwig, 2001).…”

Supramolecular architecture and photophysical and biological properties of ruthenium(ii) polypyridyl complexes

“…Hydrated halide anions are an extremely active area of research, because they are the most common anions in nature due to their role in many chemical, environmental, and biological processes. 44,45 Further studies on structures of halide-water clusters in nature is of fundamental importance for the understanding of the water-halide interaction in the atmosphere, ocean and biological systems. 44,46,47 In particular, water-chloride interactions is one of the most commonly found interactions in nature (e.g., seawater or sea-salt aerosols), and thus the examination of water-chloride interactions has been the object of numerous theoretical studies.…”

“…44,45 Further studies on structures of halide-water clusters in nature is of fundamental importance for the understanding of the water-halide interaction in the atmosphere, ocean and biological systems. 44,46,47 In particular, water-chloride interactions is one of the most commonly found interactions in nature (e.g., seawater or sea-salt aerosols), and thus the examination of water-chloride interactions has been the object of numerous theoretical studies. 44,[48][49][50] Recently several water chloride clusters in various crystal systems have been identified and structurally characterized.…”