Spectroscopic studies of inorganic fluoro-complexes. Part IV. Fluorine-19 nuclear magnetic resonance studies of platinum(IV) fluoro-complexes
- 1 January 1975
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 12,p. 1238-1243
- https://doi.org/10.1039/dt9750001238
Abstract
A number of chlorofluoro-, fluorohydroxo-, and chlorofluorohydroxo-platinate(IV) species have been characterized in solution by 19F n.m.r. spectroscopy. The 19F chemical shifts, δ, are given to a good approximation by δ=pC+qT, where C and T are constants characteristic of Cl– or OH– and p and q are the number of substituents cis and trans to the fluorine atom, respectively. The fluorohydroxoplatinate complexes are protonated in acid solution, and pK values of the aqua-species have been determined from the 19F chemical shifts as a function of pH. The observed reactions can be rationalized in terms of a trans effect of ligands, in the order Cl– > OH– F–. Solvent shifts of 195Pt–19F coupling constants are reported.Keywords
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