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  • Parallel stacking interacti...
    Sredojević, Dušan N.; Vojislavljević, Dubravka Z.; Tomić, Zoran D.; Zarić, Snežana D.

    Acta crystallographica. Section B, Structural science, 06/2012, Volume: 68, Issue: 3
    Journal Article

    Stacking interactions in the crystal structures of square-planar transition metal complexes from the Cambridge Structural Database with five- and six-membered chelate rings fused with C 6-arom rings (arom = aromatic) were analyzed. The distribution of distances between the closest C 6-arom –C 6-arom and C 6-arom –chelate contacts shows that in a large fraction of the intermolecular interactions the C 6-arom ring of one molecule is closer to the chelate than to the C 6-arom ring of the other molecule. These results indicate a possible preference of the C 6-arom ring to form stacking contacts with the chelate rings. The preference is ubiquitous and does not depend on the metal type.