Secondary bonding in functionalized organotellurium compounds: preparation and structural characterization of bis(acetamido)tellurium(IV) diiodide and bis(4-methylbenzoylmethyl)tellurium(II)

Diacetamidotellurium(IV) diiodide, prepared by the insertion of Te between Csp3 –I bond possesses 1,4-intramolecular Te⋯O interaction but is devoid of intermolecular Te⋯I or I⋯I secondary interactions. Interestingly 1,4-type intramolecular Te⋯O interaction is insignificant in bis(4-methylbenzoylmethyl)telluride, the first structurally characterized acyclic dialkyltelluride, though it is invariably present in the parent diorganotellurium(IV) dihalides, (4-YC6H4COCH2)2TeX2 and its selenium analogue.