摘要:
Formation of 2,2'-biphenylylenedimethylselenurane and -tellurane was observed by the H-1, C-11, Se-77, and Te-125 NMR studies at low temperature, in the reactions of dibenzoselenophene Se-oxide and 2,2'-biphenylyleiiedibromotellurane with methyl-lithium. These hypervalent compounds were unstable and decomposed at room temperature to give the corresponding dibenzochalcogenophenes quantitatively. (c) 2005 Elsevier Ltd. All rights reserved.