Layered alkali propanoates M.sup.+./sup.(C.sub.2./sub.H.sub.5./sub.COO).sup.-./sup. , M.sup.+./sup. = Na.sup.+./sup., K.sup.+./sup., Rb.sup.+./sup., Cs.sup.+./sup.

0533606 - FZÚ 2021 RIV GB eng J - Journal Article
Fábry, Jan - Samoľová, Erika
Layered alkali propanoates M⁺(C₂H₅COO)^- , M⁺ = Na⁺, K⁺, Rb⁺, Cs⁺.
Acta Crystallographica Section E-Crystallographic Communications. Roč. 76, Sep (2020), s. 1508-1513. ISSN 2056-9890. E-ISSN 2056-9890
R&D Projects: GA MŠMT(CZ) LO1603
Institutional support: RVO:68378271
Keywords : crystal structure * hydrogen bonding * carboxylates * The Cambridge Structural Database * positional disorder * occupational disorder
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Method of publishing: Open access

The title alkali propanoates poly[(μ5-propanoato)alkali(I)], M+(C2H5COO)-, with alkali/M+ = Na+, K+, Rb+, 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. Despite the close similarity, each of the studied alkali propanoates crystallizes in a different space group. The atoms are in general positions, except for the cation in K+(C2H5COO)-, which is situated on a mirror plane. 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+ propanoate, a disorder of the methyl H atoms is observed.

Permanent Link: http://hdl.handle.net/11104/0311945