Hydration of Ions in Aqueous Solutions Studied by Infrared Spectroscopy. II. Application.

Hydration of tetraethylammonium tetrafluoroborate derived from FTIR spectroscopy

“…Thelastreason justifies the existenceof theshoulderonthelow-wavenumber slopeof the product HDO band as well as the cation-affected H 2 O spectrum, discussed later. Generally, the anion-affected and the cation-affected HDO spectra are in good agreement with the results obtained by Kristiansson and coworkers previously [19,20,24].…”

“…Parallel studies of the BF 4 À ion by both HDO and H 2 O spectra could help to settle the long discussed problem of the manner of hydration of the weak interacting anions [17,18]. The HDO spectra in Et 4 N + ClO 4 À aqueous solution have been already studied by Kristiansson and coworkers [19,20], but the presentation of the results was not quantitative enough to allow direct comparison with our results for the Bu 4 N + cation. …”

“…Because the band shapes in Fig. 2c [19,20]) and n g OD = 2523 AE 4 cm À1 . So, it must be concluded that the most probable and the mean hydrogen bond energy are less negative in the cation surroundings than in the bulk phase.…”

“…The probability distribution P as a function of R OÁ Á ÁO has been calculated from the absorption curves according to Ref. [20] and shown in Fig. 2d.…”

The crystal structure of Cs2S2O3·H2O

“…The proton acceptor strengths of some anions present in solid hydrates can be arranged as follows ClO 4 [28,[31][32][33][34][35][36][37][38]. The different strengths of the various proton acceptors are, at least partly, due to the different net charges of the acceptor atoms.…”