Spectrochemistry of solutions. Part 19. Complexation of gold(I) by cyanide in liquid ammonia: an infrared and Raman spectroscopic study
- 1 January 1987
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 3,p. 673-675
- https://doi.org/10.1039/dt9870000673
Abstract
Complexation of AuI by CN– in liquid ammonia is different from AgI with which a large number of complexes and ion pairs occur. Like the aqueous system, ligation passes through AuCN and stops at the linear species [Au(CN)2]–. Frequencies in the i.r. and Raman spectra of these species in ammonia solution have been assigned. Raman spectra of the solution with [CN–]/[AuI]= 1 between 220 and 300 K indicate that both the free energy and entropy changes of the second complexation step are low, pointing to the existence of AuCN in ammonia as linear (H3N)Au(CN).Keywords
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