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Issue 7, 2010
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Combination of hydrogen and coordination bonding for the construction of one-dimensional networks based on a 7-azaindole appended dipyrrin

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Abstract

A new ligand (L) incorporating a dipyrrin unit acting as a strong chelate under basic conditions and a 7-azaindole group offering a self-complementary hydrogen bonding site has been designed and synthesized. Both hetero- and homoleptic complexes have been prepared and their organization in the solid state investigated by single-crystal X-ray diffraction. As in the case of the dipyrromethane precursor, the heteroleptic copper complex (acac)CuL forms a H-bonded dimer featuring the well-known R22(8) hydrogen bonding motif between two 7-azaindole groups. Interestingly, in the case of the (salen)CoL complex offering a competing H-bond acceptor site, the dihapto mode of H-bonding is disrupted. However, the robustness of the formation of the R22(8) motif is demonstrated in a series of homoleptic complexes of the ML2 type (M = Zn(II), Cu(II), Ni(II)). In spite of the different coordination sphere around the divalent metal ions, the self-complementary R22(8) hydrogen bonding motif is observed in all three cases leading to 1D chains.

Graphical abstract: Combination of hydrogen and coordination bonding for the construction of one-dimensional networks based on a 7-azaindole appended dipyrrin

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Supplementary files

Article information


Submitted
04 Jan 2010
Accepted
18 Feb 2010
First published
17 Mar 2010

CrystEngComm, 2010,12, 2238-2244
Article type
Paper

Combination of hydrogen and coordination bonding for the construction of one-dimensional networks based on a 7-azaindole appended dipyrrin

D. Pogozhev, S. A. Baudron and M. W. Hosseini, CrystEngComm, 2010, 12, 2238
DOI: 10.1039/B927348D

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