Abstract: This work presents the results of IR spectroscopic studies of the molecular states of alkali-metal (Li, Na, K, Cs) acetates in glacial acetic acid. The associates M(Ac ·nHAc)·pHAc (I) have been shown to form with n≈ 8–9 and varying number p of the outer-sphere HAc molecules, depending on the salt concentration. The anion Ac ·nHAc– is symmetrical about the central fragment O—H—O with a very strong H-bond. The anion negative charge is located mainly on this fragment and on the two nearest O⋯H—O fragments. The first coordination sphere of M+ comprises only oxygen atoms from the O—H—O group and from the anion's terminal C[double bond, length as m-dash]O groups. Associates I form a microvolume of structurized liquid phase which can be considered as a prototype of liquid-crystalline lamellar or ribbon-like structures produced by alkali acid soaps. When water is added, H2O molecules hydrate both anions and cations, M+, equalizing the polarizing influence of the latter on the anion. For hydrated salts the radius of the ordered liquid-phase microvolume around the cation M+ increases. On the whole, water addition produces a similar effect on the composition and structure of associates I as it does with liquid-crystalline water-free alkali acid soaps.

Cite: Stoyanov E.S. , Chesalov Y.A.
IR Spectroscopy Studies of Molecular States of Alkali-Metal Acetates in Acetic Acid Solution
Journal of the Chemical Society - Faraday Transactions (1990-1998, in 1999 become Physical Chemistry Chemical Physics). 1996. V.92. N10. P.1725-1730. DOI: 10.1039/ft9969201725 WOS Scopus РИНЦ ANCAN OpenAlex

Dates:

Submitted:	Nov 1, 1995
Published print:	May 21, 1996

Identifiers:

Web of science:	WOS:A1996UN95800012
Scopus:	2-s2.0-0348176098
Elibrary:	13247765
Chemical Abstracts:	1996:359335
Chemical Abstracts (print):	125:86053
OpenAlex:	W1970437173

Citing:

DB	Citing
Web of science	3
Scopus	5
Elibrary	5
OpenAlex	3

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