NDLI: Proton resonance shifts induced by individual ions in methanol and their relationship with O—H stretching frequencies. Primary-ion solvation numbers

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Proton resonance shifts induced by individual ions in methanol and their relationship with O—H stretching frequencies. Primary-ion solvation numbers

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Journal of the Chemical Society, Faraday Transactions 1 Vol - 79 Issue - 4

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Journal of the Chemical Society, Faraday Transactions 1 Vol -69

Proton resonance shifts induced by individual ions in methanol and their relationship with O—H stretching frequencies. Primary-ion solvation numbers

Content Provider	Royal Society of Chemistry (RSC)
Author	Symons, Martyn C. R.
Copyright Year	1983
Abstract	The method employed by Butler and Symons to obtain individual ion shifts for salts in methanol was incorrect since it took no account of the induced changes in the concentrations of free (OH) and free (lone-pair) groups. The shifts caused by such groups are deduced from an infrared–n.m.r. correlation based on a series of unambiguous results. The resulting individual-ion molal shifts are the weighted average of absolute shifts caused by protons in solvent molecules directly bound to the ions, and those in bulk solvent. The link between molal and absolute shifts is the solvation number of the ion. On the assumption that these data should also obey the established i.r.–n.m.r. correlation, solvation numbers have been deduced, apparently with considerable precision.Some examples of solvation numbers deduced in this way are ClO–4(2), Cl–, Br–, I–(4), Li+(4), Na+(5) and Mg2+(6). The last of these is known to be correct from slow-exchange studies at low temperatures, thereby adding confidence in this procedure.The significance of the absolute shifts obtained is discussed.
Starting Page	1273
Ending Page	1280
Page Count	8
File Format	PDF
ISSN	03009599
Volume Number	79
Issue Number	5
Journal	Journal of the Chemical Society, Faraday Transactions 1
DOI	10.1039/F19837901273
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Symons Ion Molality Li Solvent Butler Methanol
Content Type	Text
Resource Type	Article
Subject	Chemistry

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