Isolation of the novel example of a monomeric organotellurinic acid

Deka, Rajesh;Sarkar, Arup;Butcher, Ray J.;Junk, Peter C.;Turner, David R.;Deacon, Glen B.;Singh, Harkesh B.

Abstract

The stoichiometrically controlled alkaline hydrolysis of 4, (ppy)TeCl3, [ppy = 2-(2'-pyridyl)phenyl] afforded the partially hydrolyzed mu-oxo-bridged dinuclear telluroxane 5, [(ppyTeCl(2))(2)(mu-O)] and a novel example of an Intramolecular Chalcogen Bonding (IChB) stabilized, monomeric organotellurinic acid 6, (ppy)Te(O)OH. The oxidation of diaryl ditelluride 7, (ppyTe)(2) using H2O2 resulted in the isolation of mu-oxo-bridged dimethyl ester 8, [(ppy)Te(O)(OH)(OMe)](2)(O). The molecular structures of 4-6 and 8 are unambiguously authenticated by single crystal X-ray diffraction studies. The electronic structure of monomeric tellurinic acid 6 is investigated using DFT calculations. The Natural Bond Order (NBO) analysis, in corroboration with Atoms in Molecules (AIM) analysis reveals that tellurinic acid 6 is stabilized by sigma-hole participation of the tellurium atom with the pyridyl N-atom resulting in strong electrostatic interactions between the N and Te atoms.

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Dalton Transactions

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1477-9234

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Royal Society of Chemistry

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DOI

10.1039/c9dt04013g