1-Naphthyl- and mesityltellurium(IV,II) derivatives of small bite chelating organic ligands: Effect of steric bulk and intramolecular secondary bonding interaction on molecular geometry and supramolecular association

Influence of sterically demanding 1-naphthyl or mesityl ligand and a small bite chelating ligand capable of 1,4-Te⋯O intramolecular interaction on the crystal structure of unsymmetric diorganotellurium(IV) compounds was studied. The stronger steric repulsion of the mesityl group in comparison to lone pair–bond pair repulsion widens the equatorial C–Te–C angle in the diorganotellurium dichloride. Extensive Te⋯Cl bond interactions present in the case of the 1-naphthyl derivative, 1Aa are inhibited in the mesityl derivative due to larger steric requirement.