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Two crown‐ether‐coordinated caesium halogen salts
Author(s) -
Well Natalija van,
Klein Christian,
Ritter Franz,
Assmus Wolf,
Krellner Cornelius,
Bolte Michael
Publication year - 2014
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229614006809
Subject(s) - crystallography , halogen , caesium , chemistry , molecule , bromide , perpendicular , crown ether , glide plane , crystal structure , crystal (programming language) , hydrogen bond , ether , ligand (biochemistry) , salt (chemistry) , ion , inorganic chemistry , geometry , alkyl , organic chemistry , mathematics , dislocation , computer science , biochemistry , receptor , programming language
The crystal structures of two crown‐ether‐coordinated caesium halogen salt hydrates, namely di‐μ‐bromido‐bis[aqua(1,4,7,10,13,16‐hexaoxacyclooctadecane)caesium(I)] dihydrate, [Cs 2 Br 2 (C 12 H 24 O 6 ) 2 (H 2 O) 2 ]·2H 2 O, (I), and poly[[diaquadi‐μ‐chlorido‐μ‐(1,4,7,10,13,16‐hexaoxacyclooctadecane)dicaesium(I)] dihydrate], {[Cs 2 Cl 2 (C 12 H 24 O 6 )(H 2 O) 2 ]·2H 2 O} n , (II), are reported. In (I), all atoms are located on general positions. In (II), the Cs + cation is located on a mirror plane perpendicular to the a axis, the chloride anion is located on a mirror plane perpendicular to the c axis and the crown‐ether ring is located around a special position with site symmetry 2/ m , with two opposite O atoms exactly on the mirror plane perpendicular to the a axis; of one water molecule, only the O atom is located on a mirror plane perpendicular on the a axis, while the other water molecule is completely located on a mirror plane perpendicular to the c axis. Whereas in (I), hydrogen bonds between bromide ligands and water molecules lead to one‐dimensional chains running along the b axis, in (II) two‐dimensional sheets of water molecules and chloride ligands are formed which combine with the polymeric caesium–crown polymer to give a three‐dimensional network. Although both compounds have a similar composition, i.e. a Cs + cation with a halogen, an 18‐crown‐6 ether and a water ligand, the crystal structures are rather different. On the other hand, it is remarkable that (I) is isomorphous with the already published iodide compound.