Complexation of tolane by fluorinated organomercurials-structures and luminescence properties of an unusual class of supramolecular π-coordination polymers

The interaction of the Hg(II) derivatives bis(pentafluoro)phenyl mercury (1), (pentafluoro)phenyl mercury chloride (2) and trimeric perfluoro-ortho-phenylene mercury (3) with tolane (diphenylacetylene) in CH2Cl2 leads to the formation of [1 center dot tolane], [2 (2)center dot tolane], and [3 center dot tolane center dot CH2Cl2]. These adducts have been characterized by elemental analysis, X-ray crystallography, and luminescence spectroscopy. In the solid state of these adducts, the tolane molecules interact with the molecules of 1, 2 and 3 via secondary Hg-pi interactions and arene-fluoroarene interactions. As a result of an external mercury heavy atom effect, adducts [1 center dot tolane] and [2(2)center dot tolane] are phosphorescent at room temperature.