Synthesis and structure of N-arylimines of β-tellurocyclohexenals with the intramolecular coordination N → Te bonds

The X-ray determined lengths of the intramolecular coordination N → Te bonds in molecules of N-arylimines of β-tellurocyclohexenals span the range of 2.690-2.147 Å and in the compounds with strong electronegative groups X attached to the tellurium center approach the value characteristic of a standard covalent N-Te bond. The DFT calculated energies of the N → Te bonds vary from 23 kJ mol−1 (X = Ph) to 119 kJ mol−1 (X = F).