How robust is the N-H...Cl2-Cu synthon? Crystal structures of some perchlorocuprates

Krishna Kumar, D. ; Ballabh, Amar ; Amilan Jose, D. ; Dastidar, Parthasarathi ; Das, Amitava (2004) How robust is the N-H...Cl2-Cu synthon? Crystal structures of some perchlorocuprates Crystal Growth & Design, 5 (2). pp. 651-660. ISSN 1528-7483

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Official URL: http://pubs.acs.org/doi/abs/10.1021/cg0497086

Related URL: http://dx.doi.org/10.1021/cg0497086

Abstract

A series of perchlorocuprate salts, namely, [4,4'-H2diazastilbene][CuCl4] 1, [H2-N-(4-pyridyl)isonicotinamide][CuCl4] 2, [H2-N-(3-pyridyl)isonicotinamide][CuCl4] 3, [H2-N-(4-pyridyl)nicotinamide][CuCl4] 4, [H2-N,N'-bis(4-pyridyl)urea][CuCl4] 5, [H-isonicotinic acid]2[CuCl4]2H2O 6, [2-aminopyridinium]2[CuCl4] 7, and [3-aminopyridinium]2[CuCl4] 8 have been synthesized and analyzed by single-crystal X-ray diffraction. The results indicate that N-H· · · Cl-Cu hydrogen-bonding interaction is important in supramolecular syntheses of these solids. However, occurrence of bifurcated hydrogen bonding of the type N-H· · · Cl2Cu (synthon A) appears to be dependent on the topology of the cations, geometry of the anions, and other weak interactions such as C-H· · · Cl-Cu. Salts of isomeric cations such as 2, 3 and 4, and 7 and 8 are crystallographically isostructural in their respective groups despite having different hydrogen-bonding site topologies. The hydrogen-bonding-capable backbones (amide and urea moieties) in 2, 3, 4, and 5 do not display the typical hydrogen-bonding network involving these moieties.

Item Type:Article
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ID Code:59936
Deposited On:08 Sep 2011 10:20
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