Spectrochemistry of solutions. Part 21.—Inner- and outer-sphere complexes of lithium with thiocyanate in acetonitrile solutions
- 1 January 1989
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 85 (7) , 1835-1839
- https://doi.org/10.1039/f19898501835
Abstract
Solutions of lithium thiocyanate in acetonitrile and in acetonitrile containing tetra-alkylammonium salts have been examined by infrared spectrophotometry. Analysis of the spectra obtained from acetonitrile solutions has yielded formation constants for the inner- and outer-sphere 1:1 complexes with log values of 3.87 and 3.05, respectively. When added perchlorate is present only the inner-sphere complex is formed with log K= 2.5, but when fluoroborate is present the logK value is 2.26. The effects of the added anion are attributed to its forming an outer-sphere complex, {[Li(MeCN)4]X} and a triple ion {[Li(MeCN)3NCS]X}–.Keywords
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