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Coordination and hydrogen bonded networks featuring 4,4?-dicarboxy-2,2?-bipyridine (H2dcbp): structural characterisation of H2dcbp, [Co(dcbp)(H2O)4]·4H2O, and {[Cu(dcbp)(H2O)2]·2H2O}n

Coordination and hydrogen bonded networks featuring 4,4?-dicarboxy-2,2?-bipyridine (H2dcbp): structural characterisation of H2dcbp, [Co(dcbp)(H2O)4]·4H2O, and {[Cu(dcbp)(H2O)2]·2H2O}n
Coordination and hydrogen bonded networks featuring 4,4?-dicarboxy-2,2?-bipyridine (H2dcbp): structural characterisation of H2dcbp, [Co(dcbp)(H2O)4]·4H2O, and {[Cu(dcbp)(H2O)2]·2H2O}n
complexes it forms with Co(II), [Co(dcbp)(H2O)4]·4H2O, 1, and Cu(II), {[Cu(dcbp)(H2O)2]·2H2O}n, 2. H2dcbp adopts the anti conformation in the solid-state, with a dihedral angle of 148° between each pyridyl ring. Face-to-face ?? interactions reinforce intermolecular hydrogen bonding (O–HN) involving both carboxylate oxygen and pyridyl nitrogen atoms forming a 2D inter-helical network. Alternate 2D layers are of opposite chirality and are linked into 3D through (C–HO) hydrogen bonds. In both 1 and 2 the ligand is deprotonated giving neutral complexes with 1 ? 1 stoichiometry. Although 1 is monomeric, extensive hydrogen bonding between the deprotonated carboxylates, lattice water, and coordinated water molecules results in a 3D network which also contains face-to-face ?? interactions between adjacent dcbp ligands. Within 2, pseudo-octahedral coordination about the Cu(II) centre is furnished by bidentate bipyridyl nitrogens, two monodentate carboxylates (from two adjacent dcbp ligands) and two water molecules. Coordination of dcbp in this instance forms a 2D coordination polymer, which is further linked by extensive hydrogen bonding between carboxylates and water molecules, giving a 3D network.
0300-9246
1223-1228
Tynan, Eithne
dfed4bbd-ea2a-4ff9-81f5-de2af563943b
Jensen, Paul
1cfc9b74-1018-4848-9a94-b49afb907651
Kruger, Paul E.
339c2ec3-0e2a-49a1-9af4-44b44ec95e16
Lees, Anthea C.
5e121bd2-91d3-4bb3-a474-f935111b5bef
Nieuwenhuyzen, Mark
ea9efff1-bc64-4845-bcab-67a6ea6ab151
Tynan, Eithne
dfed4bbd-ea2a-4ff9-81f5-de2af563943b
Jensen, Paul
1cfc9b74-1018-4848-9a94-b49afb907651
Kruger, Paul E.
339c2ec3-0e2a-49a1-9af4-44b44ec95e16
Lees, Anthea C.
5e121bd2-91d3-4bb3-a474-f935111b5bef
Nieuwenhuyzen, Mark
ea9efff1-bc64-4845-bcab-67a6ea6ab151

Tynan, Eithne, Jensen, Paul, Kruger, Paul E., Lees, Anthea C. and Nieuwenhuyzen, Mark (2003) Coordination and hydrogen bonded networks featuring 4,4?-dicarboxy-2,2?-bipyridine (H2dcbp): structural characterisation of H2dcbp, [Co(dcbp)(H2O)4]·4H2O, and {[Cu(dcbp)(H2O)2]·2H2O}n. Dalton Transactions, (7), 1223-1228. (doi:10.1039/b212318e).

Record type: Article

Abstract

complexes it forms with Co(II), [Co(dcbp)(H2O)4]·4H2O, 1, and Cu(II), {[Cu(dcbp)(H2O)2]·2H2O}n, 2. H2dcbp adopts the anti conformation in the solid-state, with a dihedral angle of 148° between each pyridyl ring. Face-to-face ?? interactions reinforce intermolecular hydrogen bonding (O–HN) involving both carboxylate oxygen and pyridyl nitrogen atoms forming a 2D inter-helical network. Alternate 2D layers are of opposite chirality and are linked into 3D through (C–HO) hydrogen bonds. In both 1 and 2 the ligand is deprotonated giving neutral complexes with 1 ? 1 stoichiometry. Although 1 is monomeric, extensive hydrogen bonding between the deprotonated carboxylates, lattice water, and coordinated water molecules results in a 3D network which also contains face-to-face ?? interactions between adjacent dcbp ligands. Within 2, pseudo-octahedral coordination about the Cu(II) centre is furnished by bidentate bipyridyl nitrogens, two monodentate carboxylates (from two adjacent dcbp ligands) and two water molecules. Coordination of dcbp in this instance forms a 2D coordination polymer, which is further linked by extensive hydrogen bonding between carboxylates and water molecules, giving a 3D network.

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Published date: 2003
Organisations: Ocean Biochemistry & Ecosystems

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Local EPrints ID: 339674
URI: http://eprints.soton.ac.uk/id/eprint/339674
ISSN: 0300-9246
PURE UUID: c87a5152-84d7-46bf-b874-9c0c04c3fd17

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Date deposited: 28 May 2012 14:10
Last modified: 14 Mar 2024 11:13

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Contributors

Author: Eithne Tynan
Author: Paul Jensen
Author: Paul E. Kruger
Author: Anthea C. Lees
Author: Mark Nieuwenhuyzen

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