Matrix isolation study of D2Te and H2Te molecules in solid argon

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Abstract
A careful synthesis of H2Te and D2Te and their isolation in solid argon are reported. Rare gas matrix isolated molecules of H2Te and D2Te were studied using Mössbauer spectroscopy. The gaseous species were identified using mass spectrometry. Mössbauer parameters were analyzed using extended Hückel calculations. A good agreement between the experimental and the calculated value of the quadrupole splitting requires a smaller quadrupole moment for the excited state of 125Te than that reported in the literature. A 10% increase in the QS for D2Te is explained as due to the enhancement of 〈1/r3〉 caused by a slight contraction of the D–Te bond.