α-Telluration of 2,4,6-trimethylacetophenone under mild conditions: Role of steric factor in the solid state structures of Te(II and IV) compounds

α-Bromo-2,4,6-trimethylacetophenone adds oxidatively to Te0/TeII to give the dialkyl- or alkylarylTeIV species which on reduction afford carbonyl-functionalized telluroethers.