New 3,1,2,4-benzothiaselenadiazines, related π-heterocycles including Herz cations, radicals and molecular complexes, and Bunte salts

Abstract

New chalcogen-nitrogen π-heterocycles covering 3,1,2,4-benzothiaselenadiazines, 1,3,2,4-benzodithiadiazines and 1,2,4,3,5-benzotrithiadiazepines were synthesized by electrophilic cyclization of compounds Ar–N=S=N–SiMe3 under the action of SeCl2, SeCl4/FeCp2, SCl2 and S2Cl2. Heterocycles obtained were thermolyzed into...

Electron Delocalization in Benzo(thia)oxazolothiazinium Heterocycles and Ability to the π-Hole Tetrel Bond Formation

“…N,Ch-heterocyclic polyiodides (Ch is a chalcogen atom: oxygen or sulfur) − represent a wide diversity of structures due to their ability to participate in various noncovalent interactions with cation and with different polyiodide subunits. − Crystal engineering of polyiodides leads to progress in the search for semiconductors, − optical materials, and biocides . The ability of iodine atoms to form different types of noncovalent interactions, including halogen, chalcogen, pnictogen, and tetrel bonds, is widely known due to the impact of these interactions on practically important properties, such as thermal stability, , conductivity, , optical characteristics, and bacteriostatic activity .…”

“…27 There are also series of studies of fluorescent sensor properties of benzoxazole derivatives. 28 Nevertheless, the literature provides very little information about benzoxazolo [2,3-b] [1,3]thiazin-5-ium systems. In this regard, halocyclization of alkenylic derivatives in heterocycles is very perspective as a simple and effective method of polyiodide synthesis.…”

The effect of halides and coordination mode of 4-amino-2,1,3-benzothiadiazole on the luminescence properties of its Zn complexes

“…The chemistry of sulphur-nitrogen heterocyclic compounds is rapidly developing at the interface between organic chemistry, materials science and engineering, giving rise to encouraging compounds. [1][2][3][4][5][6][7][8][9] 2,1,3-Benzothiadiazole (btd) stands out among the heterocyclic compounds owing to its electron-withdrawing and photophysical properties as well as simple functionalization methods. 2 Btd derivatives can be applied as components of organic light-emitting diodes (OLEDs), dyes, and solar cells and as markers in biological research.…”