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Issue 9, 2007
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Stacking vs. CH–π interactions between chelate and aryl rings in crystal structures of square-planar transition metal complexes

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Abstract

The crystal structures of square-planar transition-metal complexes from the Cambridge Structural Database (CSD) with close contacts between planar chelate rings and aryl rings containing six carbon atoms (C6-aryl) were analyzed. Most of the chelate rings in these structures are fused with aromatic or other π-delocalized chelate rings. The results show that planar chelate rings can be involved in stacking and CH–π interactions with organic aryl rings. However, the number of stacking interactions is a few times larger than the number of CH–π interactions. The analysis also shows that in almost all cases CH–π interactions are formed only when stacking interactions are prevented by voluminous substituents. Hence, between planar chelate rings and C6-aryl rings stacking interactions are preferred to CH–π interactions.

Graphical abstract: Stacking vs. CH–π interactions between chelate and aryl rings in crystal structures of square-planar transition metal complexes

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Publication details

The article was received on 21 Mar 2007, accepted on 24 May 2007 and first published on 15 Jun 2007


Article type: Paper
DOI: 10.1039/B704302C
CrystEngComm, 2007,9, 793-798

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    Stacking vs. CH–π interactions between chelate and aryl rings in crystal structures of square-planar transition metal complexes

    D. Sredojević, G. A. Bogdanović, Z. D. Tomić and S. D. Zarić, CrystEngComm, 2007, 9, 793
    DOI: 10.1039/B704302C

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