Adducts of co-ordination compounds. Part II. Compounds of nitric acid and trans-dihalogenotetrapyridinemetal(III) nitrates
- 1 January 1966
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A
- p. 549-552
- https://doi.org/10.1039/j19660000549
Abstract
The adduct of nitric acid with trans-dibromotetrapyridinerhodium(III) nitrate reported in 1935 contains the hydrogen dinitrate anion, and is now formulated as trans-[Rh py4Br2](O2NO,H,ONO2). A number of similar adducts of complexes, with formulætrans-[MA4X2](O2NO,H,ONO2), have been prepared, where M = Co or Rh, A = pyridine or ½(bipyridyl), and X = Cl or Br. The presence of the hydrogen dinitrate anion in all these compounds is demonstrated by analysis, infrared spectroscopy, and by conductivity and pH studies. The adducts are stable compounds, and the anion exists undissociated in some solvents; it probably contains a symmetrical hydrogen bond.Keywords
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