Synthesis and Single Crystal X-ray Studies of Cyclic and Acyclic Organotellurium(IV) Diiodide

Elemental Te inserts across the C–I bond of in situ generated iodo derivatives of 1,3-dibromopropane, (trimethylsilyl)methyl iodide, benzyl chloride and m -nitro-benzyl bromide to give rise the , (Me 3 SiCH 2 ) 2 TeI 2 , (C 6 H 5 CH 2 ) 2 TeI 2 , and ( m -NO 2 -C 6 H 4 CH 2 ) 2 TeI 2 molecules in good yield respectively. These molecules are characterised by 1 H NMR and elemental analysis techniques. Among these (C 6 H 5 CH 2 ) 2 TeI 2 and ( m -NO 2 -C 6 H 4 CH 2 ) 2 TeI 2 molecules are also characterized by single-crystal X-ray studies. In the packing diagram of (C 6 H 5 CH 2 ) 2 TeI 2 , there are intermolecular Te⋯π-phenyl interaction (3.768 Å) between the tellurium atoms and phenyl rings of adjacent molecule. The crystal packing of ( m -NO 2 –C 6 H 4 CH 2 ) 2 TeI 2 , displays an interesting supramolecular synthon. This synthon is based on reciprocal several C–H⋯O, C–H⋯I Hydrogen bonding interactions along with Te⋯I Secondary bonding interactions. Graphical Abstract