Add time:08/30/2019         Source:sciencedirect.com

At 10–20 K the broad room temperature IR bands of the hydrogen bonded cluster anions in tetramethylammonium fluoride and hydroxide monohydrates and monohydrates-dn are resolved into a number of components. The band patterns are consonant with distortion of formally tetrahedral H4F2O22− and H6O42− ions of Td point group to C2v and S4, respectively in a C4h5 unit cell isomorphous with tetramethylammonium hexafluorosilicate. A lattice mode has been identified for each monohydrate.

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