Abstract
The compounds (dma) 2HPF 6, (dma) 2HAsF 6 and (dma) 2HSbF 6 (dma = dimethylacetamide) have been investigated by IR, 1H and 19F NMR spectroscopy. Spectral data are consistent with the isomorphous crystal structures of (dma) 2HPF 6, and (dma) 2HSbF 6 in which short hydrogen bridges (O·O 2.419(4) and 2.443(7) Å, respectively) are present. The fluorine atoms of the anions display twofold disorder and high thermal motion.
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