Synthesis and Structure of Telluroamides and Selenoamides. The First Crystallographic Study of Telluroamides

Abstract

The reaction between bis(trialkyltin) chalcogenides and trimethylaluminum results in the formation of bis(dimethylaluminum) chalcogenides, (Me2Al)2E, where E is S, Se, or Te. Reaction between the latter and carbonyl groups (but not carboxylic acids or esters) converts them to carbon−chalcogen double-bond (CE) compounds. Using this procedure, we have successfully synthesized several telluro- and selenocarbonyl compounds. The first successful synthesis of an isolable, crystalline telluroformamide, 4-(telluroformyl)morpholine (3c, C5H9NOTe), and its crystal structure are reported. Also, the syntheses and crystal structures of a γ-tellurolactam, 1-methyl-2-telluroxopyrroline (3d, C5H9NTe), and two selenoamides, N,N-diphenylselenoformamide (3a, C13H11NSe) and N-methyl-N-(4-nitrophenyl) selenoformamide (3b, C8H8N2O2Se) are described.

Design of reversible multi-electron redox systems using benzochalcogenophenes containing aryl and/or ferrocenyl fragments

“…Finally, the isothianaphthene core was formed through ring closure of 3a-d by means of Lawesson's reagent to give 1,3-disubstituted benzo [c]thiophene (4a-d) in moderate yield (Scheme 2). In the case of the synthesis of 1,3-diferrocenylbenzo [c]selenophene (5) the final ring-closure reaction was performed by the use of bis(dimethylaluminium) selenide developed by Segi and Zingaro [10] as a selenating reagent.…”

Thin‐Film Semiconductors Deposited in Nanometric Scales by Electrochemical and Wet Chemical Methods for Photovoltaic Solar Cell Applications

“…The kinetics of fi lm formation can be understood from the following reaction sequence [226] : Na TeSO OH Na SO HTe The preparation of CdTe:CdS clusters, which used a chemical deposition method, has been reported [227] . To increase the utility of CBD, tellurocarbonyls have been synthesized recently [228,229] . The successful preparation of thin fi lms of CdTe by an exchange reaction is described by the following equation [ …”

Synthesis and Applications of Chalcogenoamide: Thio-, Seleno- and Telluroamides

“…This is mainly due to the labilities of telluroamides under air. Crystallographic study of telluroamides and telluroiminium salts 60, introduced by a reaction of telluroamides with methyl triflate, has been investigated [93][94][95][118][119][120] (Scheme 37). …”