Second-sphere coordination of ‘star’-shaped hexakis(N-pyridin-4-one)benzene (HPOB) with hexakis(methanol)nickel(II) nitrate; unusual (NO3)(HPOB)(NO3) π-stacked ‘sandwiching’ |
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| Authors: | David M. L. Goodgame David A. Grachvogel David J. Williams |
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| Affiliation: | Department of Chemistry, Imperial College of Science, Technology and Medicine, London SW7 2AY, UK |
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| Abstract: | It is shown by X-ray studies that the compound Ni(HPOB)(NO3)2(MeOH)9 [where HPOB=hexaxis(N-pyridin-4-one)benzene] contains [Ni(MeOH)6]2+ cations hydrogen-bonded to the oxygen atoms of the pyridone units in HPOB, with the resulting six-connectivity at both metal and HPOB producing a three-dimensional network array essentially topologically equivalent to the -Po structure. The pyridone rings in the HPOB molecules are arranged orthogonally to the central C6 ring and the nitrate anions form an unusual (NO3 −)(HPOB)(NO3 −) ‘sandwich’ by a combination of π-stacking and C---HO hydrogen bonds. |
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| Keywords: | Crystal structures Hydrogen-bonding 3D network π-stacking |
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