[NMe₄][I₄Br₅]: A new Iodobromide from an Ionic Liquid with Halogen–Halogen Interactions

Abstract

Tetramethylammonium tetraiodopentabromide [NMe ][I Br ] was the first iodobromide to be synthesized and crystallized in an ionic liquid as well as in dichloromethane. The new iodobromides show different structure motives yet are unknown from other nonahalides and can be better described as [(I Br ) ⋅2 IBr]. The additional IBr units are connected by halogen-halogen interactions on the central V-shaped [I Br ] . The characterization was performed by Raman spectroscopy and single crystal X-ray structure determination. Conductivity measurements, thermogravimetric analysis and quantum-chemical calculations completed the structural discussion.

Chlorobismuthates Trapping Dibromine: Formation of Two‐Dimensional Supramolecular Polyhalide Networks with Br2 Linkers

“…This factor is the major obstacle, making characterization using other common physical methods rather problematic, although we managed to conduct the TG experiment for 3 by handling the freshly precipitated sample rapidly (see Supporting Information; gradual loss of Br 2 was observed). These observations are in very good agreement with the theoretical and experimental data obtained for different polyhalides:, the overall stability decreases dramatically in the order I > Br > Cl >> F even in the case when halide atoms are involved in covalent bonding. Obviously, since the Br ··· Cl contacts in 1 – 3 are more of supramolecular nature, their decomposition should be more favorable in comparison with that of “true polyhalides”.…”

From Square‐Planar [ICl4]− to Novel Chloroiodates(III)? A Systematic Experimental and Theoretical Investigation of Their Ionic Liquids

“…It has to be noted, though, that if Z À is more electropositive than Xo rY , redox reactions can occur upon mixingo ft he components. [21] It is interesting to note, that Yagi and Popov could isolates ome of their organic [I 2 Cl 3 ] À salts only as red oils, instead of crystalline materials. The first is the addition of homoatomic dihalogen molecules to ad ifferent, more electronegativeh alogen anion, yielding polyinterhalogen monoanions like those in [N(CH 3 6 ]( m.p.…”

Polybromide Dianions and Networks Stabilized by Fluorinated Bromo(triaryl)phosphonium Cations

“…[11] In a similar approach but without using ionic liquids as a solvent we performed our reactions in neat bromine. Our compound crystallizes in the form of orange needles in the monoclinic space group P2 1 [14] Here, the asymmetric unit contains two different heptabromides with a distorted trigonal pyramidal structure ( Figure 1). of Br 2 a new structural motif of the compound due to packing polymorphism was obtained.…”