2-D Coordination Polymers of Hexa(4-cyanophenyl)[3]-radialene and Silver(I): Anion•••π-Interactions and Radialene C−H•••Anion Hydrogen Bonds in the Solid-State Interactions of Hexaaryl[3]-radialenes with Anions
Date
2009
Authors
Hollis, C.
Hanton, L.
Morris, J.
Sumby, C.
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Journal article
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Crystal Growth and Design, 2009; 9(6):2911-2916
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Courtney A. Hollis, Lyall R. Hanton, Jonathan C. Morris, and Christopher J. Sumby
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Abstract
As part of our studies of ligands containing an electron-deficient [3]-radialene core we discovered that the hexadentate ligand hexa(4-cyanophenyl)[3]-radialene 1 forms 6,3-connected 2-D coordination polymers on reaction with silver(I). Compounds {[Ag(1)](PF6) · 2(CH3NO2)}n 2 and {[Ag(1)](ClO4) · 2(CH3NO2)}n 3, which are the first coordination polymers of 1, readily crystallize from solutions of the silver salt and 1 in noncoordinating nitromethane solvent and were characterized by X-ray crystallography. In these structures the ligand is hypodentate, coordinating only through four nitrile N-donors to act as a 3-connecting center. The distorted tetrahedral silver also acts as a 3-connecting center. In the extended structure the anions lie in pockets above and below the [3]-radialene core of the ligands, forming moderate and weak hydrogen bonds with four different molecules of 1. The anions are in close proximity to the electron-deficient [3]-radialene core of 1, forming weak anion-π interactions.
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© 2009 American Chemical Society