First structural evidence of a Se–Br–Br halogen-bonded molecular complex

Abstract

Bromination of the bicyclic selenoether (2,6-dibromo-9-selenabicyclo[3.3.1]-nonane) affords the products ranging from the unique molecular complex C8H12Br2Se–Br2 to the ionic polybromide complex [C8H12Br2SeBr+]Br5.

Bromo‐ and Polybromoantimonates(V): Structural and Theoretical Studies of Hybrid Halogen‐Rich Halometalate Frameworks

“…Despite these inspiringb eginning, our attemptst ot race any consequent researchi nt his field were not successful. Considering that the chemistry of polyhalides has experienced ar enaissance within the last few years (a numbero ff undamentally important results were reported), [27][28][29][30][31][32][33][34][35][36][37] we believe that these studies are worth resuming and pursuingf urther,b yu sing the panoply of modern methods and approaches.…”

Role of the Solvent in the Reactivity of Bis-4-imidazoline-2-selone Derivatives toward I2: An Experimental and Theoretical Approach

“…On the contrary, a plethora of structurally different solid state products can be obtained by reacting I 2 with thioamides and selenoamides, RE (E = S and Se), in particular, those heterocyclic derivatives shown in Scheme . , In particular, besides 1:1 CT adducts, the formation of “extended spoke” CT adducts RE–I 2 –I 2 involving a second I 2 halogen-bonded (XB) molecule interacting with the first one bound to the chalcogen atom and iodonium salts featuring a two-chalcogen-coordinated iodine­(I) complexes [RE–I–ER] + (R = organic framework) is observed with the group of donors sketched on the left in Scheme . ,− In contrast, the prevailing formation of I 2 “T-shaped” hypercoordinate adducts, ,,,, featuring an almost linear I–Se–I moiety, or diselenide cations, [RSe–SeR] n + ( n = 1, 2), featuring a chalcogen–chalcogen bond ,,, is observed when molecules with a higher donor strength (higher 1:1 CT I 2 -adduct formation constant in solution, K f ) are considered, especially Se-donor molecules and imidazoline derivatives, as shown on the right of Scheme . The formation of donor oxidation products is the rule, when Br 2 ,,,− and inter-halogens (IBr and ICl) (in this latter case, especially with donors belonging to the group on the right in Scheme ) ,,− are employed because of their stronger oxidation properties.…”

Heteroleptic Binuclear Iodoacetate Copper(II) Complexes with 3-Bromopyridine and 4-Ethylpyridine: Crystal Structures and Peculiarities of Contacts Halogen···Halogen

“…The search for new "building blocks" capable of halogen bonding is an interesting task from the viewpoint of supramolecular coordination chemistry. In particular, neutral complexes of the [M II L 2 X 2 ] type (X = Cl, Br, I; L is the halogen-containing N-donor ligand) [8][9][10][11], polyhalides [12,13], perfluorinated arenes [14,15], etc. are considered as candidates to this role.…”