New Insights into the Structures of Diorganotellurium Oxides. The First Polymeric Diorganotelluroxane [( p -MeOC 6 H 4 ) 2 TeO] n

The characterization of the previously reported diorganotellurium oxides R 2 TeO (R = Ph ( 1 ) and p -MeOC 6 H 4 ( 2 )) was revisited by osmometric molecular weight determinations, 125 Te NMR spectroscopy, and electrospray spectrometry (ESMS) in solution and by 125 Te MAS NMR spectroscopy in the solid state. The single-crystal X-ray structure of 2 revealed a polymeric arrangement that features a zigzag configured Te−O backbone without any secondary Te···O interactions. In solution 1 and 2 exist predominantly as monomers but appear to be in equilibrium with higher oligomers to a minor extent.