1,2,5-Telluradiazole, C2H2N2Te

The supramolecular chemistry of 1,2,5-chalcogenadiazoles

“…1,2,5-Telluradiazoles have been prepared by very different synthetic routes (Scheme 2). The parent telluradiazole and other derivatives has been obtained from the corresponding thia-and selenadiazoles by reaction with Grignard reagents, followed by TeCl 4 [15]. Unexpectedly, an attempt to prepare a tellurium diimide by reaction II resulted in the formation of a benzotelluradiazole.…”

A survey of tellurium-centered secondary-bonding supramolecular synthons

“…Within this set, there are fifteen structures with Te-D SBIs shorter than 80% of the sum of r vdW (Table 2) and in each case the actual supramolecular synthon is the virtual four-membered heterocycle [Te-D] 2 . Six of these crystal structures (1,2,5-telluradiazole (32) [64], phenanthro(9,10-c)-1,2,5-telluradiazole (33) [65], 4,6-di-t-butylbenzo-2,1,3-telluradiazole (37) [44], benzo-2,1,3-telluradiazole (38) [66], 4,7-dibromobenzo-2,1,3-telluradiazole (39) [66], and the DMSO adduct of 4,7-dibromobenzo-2,1,3-telluradiazole (26) [66]) feature the synthon [Te-N] 2 assembled by 1,2,5-telluradiazole heterocyclic building blocks. The corresponding SBIs are very short; the same is observed for the SBIs in [Te D] (Table 1) formed by 1,2-tellurazole heterocycles, 6 [67] and 12 [54].…”

5-[2-Methyl-1-(4-methylphenyl)-2-nitropropyl]-4-phenyl-1,2,3-selenadiazole

“…For related literature see: Mellini & Merlino (1976a,b); Bertini et al (1984); El-Kashef et al (1986); El-Bahaie et al (1990); Kuroda et al (2001); Padmavathi et al (2002); Saravanan et al (2006). A similar compound with a chlorophenyl ring has been reported recently (Gunasekaran et al, 2007).…”