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The halogen-bonded adduct 1,4-bis(pyri-din-4-yl)buta-1,3-diyne-1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8-hexa-deca-fluoro-1,8-diiodo-octane (1/1).

ABSTRACT: In the crystal structure of the title compound, C8F16I2·C14H8N2, the mol-ecules form infinite chains parallel to [2-11] through two symmetry-independent C-I?N halogen bonds (XBs). As commonly found, the perfluoro-alkyl mol-ecules segregate from the hydro-carbon 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.

SUBMITTER: Cavallo G 

PROVIDER: S-EPMC3588426 | biostudies-literature | 2013 Mar

REPOSITORIES: biostudies-literature

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The halogen-bonded adduct 1,4-bis(pyri-din-4-yl)buta-1,3-diyne-1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8-hexa-deca-fluoro-1,8-diiodo-octane (1/1).

Cavallo Gabriella G   Marras Giovanni G   Metrangolo Pierangelo P   Pilati Tullio T   Terraneo Giancarlo G  

Acta crystallographica. Section E, Structure reports online 20130202 Pt 3

In the crystal structure of the title compound, C8F16I2·C14H8N2, the mol-ecules form infinite chains parallel to [2-11] through two symmetry-independent C-I⋯N halogen bonds (XBs). As commonly found, the perfluoro-alkyl mol-ecules segregate from the hydro-carbon 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  ...[more]

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