Vibrational spectra and solution studies on iodyl compounds

An Accidental Discovery of a New Mixed-Valent Iodine Compound − Crystal Structure of Difluoroiodato(V) Iodine(III) Dichloride [Cl2IOI(O)F2]

“…For comparison, in KIO 2 F 2 the IϪF stretching modes are found at 472 and 434 cm Ϫ1 and in IF 3 O at 515 and 550 cm Ϫ1 . [23] A similar behaviour is observed for the IϪO stretching modes. In the Raman spectrum these have only low intensities but in the IR spectrum they are assigned to very strong bands.…”

A continuing role for sulfuric acid cryoscopy. The IO2+ ion

“…The i factors shown in Table 3 and compared with the values calculated for eqs. [7], [8], and [9], point clearly to reaction [9].…”

“…[7] ( 6 ) , but Gillespie and Senior obtained evidence instead for the formation of iodyl hydrogen sulfate (eq. [8]), and its subsequent polymerisation (7). They found no reason to believe that the iodyl ion is formed either in sulfuric acid (eq.…”

“…They found no reason to believe that the iodyl ion is formed either in sulfuric acid (eq. [9]) or in oleum, although the existence of this ion in fluorosulfonic acid has been deduced from the conductivity of the solute I02S03F (8).…”

Synthesis, vibrational and NMR spectroscopic characterization of [N(CH3)4][IO2F2] and X-ray crystal structure of [N(CH3)4]2[IO2F2][HF2]

“…In contrast, [Ag][IO 2 F 2 ] has been prepared by solvolysis of [Ag] [IO 3 ] in anhydrous HF [6]. The majority of difluoroiodates have been poorly characterized and only [K][IO 2 F 2 ], which has been shown to be ferroelastic at room temperature, has been characterized by X-ray crystallography [7,8] and by Raman and infrared spectroscopy [9,10]. The Cs + salt could not be prepared pure, but was isolated as [ 2 ], which are the first NðCH 3 Þ þ 4 salts of IO 2 F À 2 .…”