N-Triphenylboryl- and N,N'-bis(triphenylboryl)benzo-2,1,3-telluradiazole

摘要

Being isoelectronic and isostructural analogues of N-alkyl-substituted telluradiazolyl cations, the adducts of triphernlborane with benzo-2,1,3-telluradiazole provide an electrically neutral point of reference with which the properties of the heterocyclic ions can be compared.rnMono- and di-cations derived by formal N-alkylation of 1,2,5-chalcogenadiazolyl heterocycles are receiving increasing attention due to their intriguing structural and chemical properties. The dialkylated systems are regarded as a family of structural analogues of the N-heterocyclic carbene (NHC) imidazol-2-ylidene; of which the Se member has been described as a "chalcogen dication sequestered by a chelating diimine".