Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 3 (March 2013)

organic compounds

Acta Cryst. (2013). E69, o328-o329    [ doi:10.1107/S1600536813001888 ]

The halogen-bonded adduct 1,4-bis(pyri­din-4-yl)buta-1,3-diyne-1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8-hexa­deca­fluoro-1,8-diiodo­octane (1/1)

G. Cavallo, G. Marras, P. Metrangolo, T. Pilati and G. Terraneo

Abstract: In the crystal structure of the title compound, C8F16I2·C14H8N2, the mol­ecules form infinite chains parallel to [2-11] through two symmetry-independent C-I...N halogen bonds (XBs). As commonly found, the perfluoro­alkyl mol­ecules segregate from the hydro­carbon ones, forming a layered structure. Apart from the XBs, the only contact below the sum of van der Waals radii is a weak H...F contact. The topology of the network is a nice example of the paradigm of the expansion of ditopic starting modules; the XB leads to the construction of infinite supramolecular chains along [2-11] formed by alternating XB donors and acceptors.

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