A novel two-dimensional metal-organic supramolecular framework including π-π stacking and hydrogen-bond interactions

• Published in: Acta crystallographica. Section C, Crystal structure communications Vol. 69; no. 7; pp. 730 - 733
• Main Authors: Wu, Xiao-Liu, Zhang, Xiao-Min, Huang, Shu-Yun, Zhou, Wei-Na, Wang, Zhi-Chang
• Format: Journal Article
• Language: English
• Published: 5 Abbey Square, Chester, Cheshire CH1 2HU, England International Union of Crystallography 01.07.2013
• Subjects: Crystal structure; Distortion; Ligands; Luminescence; Pyridines; Stacking; Supramolecular frameworks; Terminals
• ISSN: 0108-2701; 1600-5759
• DOI: 10.1107/S0108270113015151

[μ‐N,N′‐Bis(pyridin‐3‐yl)benzene‐1,4‐dicarboxamide‐<!?show [forcelb]><!?tlsb=0.12pt>1:2κ2N:N′]bis{[N,N′‐bis(pyridin‐3‐yl)benzene‐1,4‐dicarboxamide‐κN]diiodidomercury(II)}, [Hg2I4(C18H14N4O2)3], is an S‐shaped dinuclear molecule, composed of two HgI2 units and three N,N′‐bis(pyridin‐3‐yl)benzene‐1,4‐dicarboxamide (L) ligands. The central L ligand is centrosymmetric and coordinated to two HgII cations via two pyridine N atoms, in a syn–syn conformation. The two terminal L ligands are monodentate, with one uncoordinated pyridine N atom, and each adopts a syn–anti conformation. The HgI2 units show highly distorted tetrahedral (sawhorse) geometry, as the HgII centres lie only 0.34 (2) or 0.32 (2) Å from the planes defined by the I and pyridine N atoms. Supramolecular interactions, thermal stability and solid‐state luminescence properties were also measured.