English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The title alkali propano-ates poly[(μ 5 -propano-ato)alkali(I)], M  + (C 2 H 5 COO) - , with alkali/ M  + = Na + , K + , Rb + and Cs + , show close structural similarity, which is manifested by the coordination of the cations by six oxygen atoms in a chessboard motif, forming a bilayer. This bilayer is situated between hydro-phobic layers composed of dangling ethyl chains from the carboxyl-ate groups. Stacking of these two-dimensional sandwiches, which are parallel to (001), forms the title structures. Each metal cation is coordinated by six O atoms in the form of a distorted trigonal prism. One pair of these oxygen atoms belongs to a bridging, bidentately coordinating carboxyl-ate anion, while each of the other four oxygen atoms belongs to different carboxyl-ate groups, which are in a bridging monodentate mode. Despite the close similarity, each of the studied alkali propano-ates crystallizes in a different space group. The atoms are in general positions, except for the cation in K + (C 2 H 5 COO) - , which is situated on a mirror plane. Positional disorder of the methyl groups that are disordered over two positions is present in the Na + and K + propano-ates, in contrast to the Rb + and Cs + propano-ates. In the Na + compound, the occupational parameters of the disordered methyl groups are different compared to the K + compound where they are equal. This difference results in doubling of the a unit-cell parameter of the Na + compound with respect to that of the K + compound, otherwise the structures are homeotypic. In Cs + propano-ate, a disorder of the methyl H atoms is observed.

acta crystallographica. section e, crystallographic communications

Layered alkali propanoatesM+(C2H5COO)−;M+= Na+, K+, Rb+, Cs+