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Crystal structures of two solvates of (18-crown-6)potassium acetate.

ABSTRACT: The crystal and mol-ecular strutures of two solvated forms of [K(18c6)]OAc (18c6 = 18-crown-6 = 1,4,7,10,13,16-hexa-oxa-cyclo-octa-decane and OAc = acetate) were determined by single-crystal X-ray diffraction, namely (acetato-?²O,O')(1,4,7,10,13,16-hexa-oxa-cyclo-octa-decane-?⁶O)potassium dihydrate, [K(CH₃COO)(C₁₂H₂₄O₆)]·2H₂O (1) and (acetato-?²O,O')aqua-(1,4,7,10,13,16-hexa-oxa-cyclo-octa-decane-?⁶O)potassium acetic acid monosolvate [K(CH₃COO)(C₁₂H₂₄O₆)(H₂O)]·CH₃COOH (2). In both compounds, the acetate anion is bonded to the potassium ion in a chelating fashion and the metal atom is consequently slightly displaced from the O₆ plane of the crown ether. In the crystals, O-H?O hydrogen bonds lead to a polymeric ladder structure in the dihydrate 1, while the acetic acid hydrate 2 features inversion dimers.

SUBMITTER: Liebing P

PROVIDER: S-EPMC5137602 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature

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Crystal structures of two solvates of (18-crown-6)potassium acetate.

Liebing Phil P Zaeni Ahmad A Olbrich Falk F Edelmann Frank T FT

Acta crystallographica. Section E, Crystallographic communications 20161108 Pt 12

The crystal and mol-ecular strutures of two solvated forms of [K(18c6)]OAc (18c6 = 18-crown-6 = 1,4,7,10,13,16-hexa-oxa-cyclo-octa-decane and OAc = acetate) were determined by single-crystal X-ray diffraction, namely (acetato-κ2O,O')(1,4,7,10,13,16-hexa-oxa-cyclo-octa-decane-κ6O)potassium dihydrate, [K(CH3COO)(C12H24O6)]·2H2O (1) and (acetato-κ2O,O')aqua ...[more]

PMID: 27980824

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