Unusual variations in the incidence of Z ' > 1 in oxo-anion structures (2006)
Journal Article
Anderson, K., Goeta, A., Hancock, K., & Steed, J. (2006). Unusual variations in the incidence of Z ' > 1 in oxo-anion structures. Chemical Communications, 2006(20), 2138-2140. https://doi.org/10.1039/b602492k

A series of Cambridge Structural Database studies show that ionic species generally form low Z′ structures, even in those cases where charge assisted hydrogen bonding is a key feature, e.g. oxo-anion complexes. By introducing a competing π–π stacking... Read More about Unusual variations in the incidence of Z ' > 1 in oxo-anion structures.

When Z '=2 is better than Z '=1-supramolecular centrosymmetric hydrogen-bonded dimers in chiral systems (2006)
Journal Article
Anderson, K., Afarinkia, K., Yu, H., Goeta, A., & Steed, J. (2006). When Z '=2 is better than Z '=1-supramolecular centrosymmetric hydrogen-bonded dimers in chiral systems. Crystal Growth and Design, 6(9), 2109-2113. https://doi.org/10.1021/cg0603265

High Z‘ structures can be engineered by combining a molecule with one (or more) resolved chiral center(s) with a strongly directional supramolecular synthon with a preference for centrosymmetry because, in order to preserve the dimer motif, one or mo... Read More about When Z '=2 is better than Z '=1-supramolecular centrosymmetric hydrogen-bonded dimers in chiral systems.

Crystal engineering with ethynylbenzenes Part 2. Structures of 4-trimethylsilylethynyl-N,N-dimethylaniline, and 4-ethynyl-N,N-dimethylaniline with Z '=12 and a single-crystal to single-crystal phase transition at 122.5 +/- 2 K (2006)
Journal Article
Batsanov, A., Collings, J., Ward, R., Goeta, A., Porres, L., Beeby, A., …Marder, T. (2006). Crystal engineering with ethynylbenzenes Part 2. Structures of 4-trimethylsilylethynyl-N,N-dimethylaniline, and 4-ethynyl-N,N-dimethylaniline with Z '=12 and a single-crystal to single-crystal phase transition at 122.5 +/- 2 K. CrystEngComm, 8, 622-628. https://doi.org/10.1039/b606327f

The crystal and molecular structures of 4-ethynyl-N,N-dimethylaniline (1), and 4-(trimethylsilylethynyl)-N,N-dimethylaniline (2), have been obtained from X-ray diffraction data. Crystals of 1 exhibit a phase transition at 122.5 ± 2 K. Both polymorphs... Read More about Crystal engineering with ethynylbenzenes Part 2. Structures of 4-trimethylsilylethynyl-N,N-dimethylaniline, and 4-ethynyl-N,N-dimethylaniline with Z '=12 and a single-crystal to single-crystal phase transition at 122.5 +/- 2 K.

Helical or polar guest-dependent Z‘ = 1.5 or Z‘ = 2 forms of a sterically hindered bis(urea) clathrate. (2006)
Journal Article
Todd, A., Anderson, K., Byrne, P., Goeta, A., & Steed, J. (2006). Helical or polar guest-dependent Z‘ = 1.5 or Z‘ = 2 forms of a sterically hindered bis(urea) clathrate. Crystal Growth and Design, 6(8), 1750-1752. https://doi.org/10.1021/cg060318o

A sterically hindered bis(pyridylurea) species forms clathrates with water, methanol, and ethanol, all exhibiting unusual polar structures with Z‘ > 1. This crystal packing is due to the hindered geometry about the urea oxygen acceptor atoms.

Anion binding by Ag(I) complexes of urea-substituted pyridyl ligands (2005)
Journal Article
Turner, D., Smith, B., Spencer, E., Goeta, A., Evans, I., Tocher, D., …Steed, J. (2005). Anion binding by Ag(I) complexes of urea-substituted pyridyl ligands. New Journal of Chemistry, 29(1), 90-98

A series of Ag(I) complexes of ureidopyridyl ligands 1 and 2 have been prepared from oxo-anion salts. In all cases the new materials contain the AgL2+ cation interacting with oxo-anions via the urea moiety. The complexes containing the para ligand 2:... Read More about Anion binding by Ag(I) complexes of urea-substituted pyridyl ligands.

Influence of hydrogen bonding on coordination polymer assembly (2005)
Journal Article
Applegarth, L., Goeta, A., & Steed, J. (2005). Influence of hydrogen bonding on coordination polymer assembly. Chemical Communications, 2405-2406

An extended dipyridyl ligand (L-1) capable of hydrogen bonding with guest species via urea functionalities has been designed and synthesised. Assembly of a silver(I) coordination polymer of L-1 is dependent on the nature of the hydrogen bond acceptor... Read More about Influence of hydrogen bonding on coordination polymer assembly.

Modular nanometer-scale structuring of gel fibres by sequential self-organization (2005)
Journal Article
Applegarth, L., Clark, N., Richardson, A., Parker, A., Radosavljevic-Evans, I., Goeta, A., …Steed, J. (2005). Modular nanometer-scale structuring of gel fibres by sequential self-organization. Chemical Communications, 5423-5425

Ag(I) and Cu(II) complexes of a series of simple bis( urea) ligands form soft metallogels. X-ray crystallographic results suggests that the gels' structure is based on hydrogen bonding to counter anions and thus suggests a route to tunable gel rheolo... Read More about Modular nanometer-scale structuring of gel fibres by sequential self-organization.

Cooperative hydrogen-bonding effects in a water square: A single-crystal neutron and partial atomic charges and hardness analysis study (2005)
Journal Article
Turner, D., Henry, M., Wilkinson, C., McIntyre, G., Mason, S., Goeta, A., & Steed, J. (2005). Cooperative hydrogen-bonding effects in a water square: A single-crystal neutron and partial atomic charges and hardness analysis study. Journal of the American Chemical Society, 127(31), 11063-11074. https://doi.org/10.1021/ja052081a

Four isomorphous complexes of formula [M(L)(4)(H2O)(2)]SO(4)center dot 2H(2)O (M = CO, 1a; Ni, 1b; Cu, 1c; Zn, 1d) have been isolated and characterized by single-crystal X-ray diffraction and neutron diffraction using the quasi-Laue diffractometer VI... Read More about Cooperative hydrogen-bonding effects in a water square: A single-crystal neutron and partial atomic charges and hardness analysis study.

The R-1(2)(6) hydrogen-bonded synthon in neutral urea and metal-bound halide systems (2004)
Journal Article
Turner, D., Smith, B., Goeta, A., Evans, I., Tocher, D., Howard, J., & Steed, J. (2004). The R-1(2)(6) hydrogen-bonded synthon in neutral urea and metal-bound halide systems. CrystEngComm, 6, 633-641

The recurrence of the R-1(2)(6) motif between urea and metal bound halides is explored through studies in the CSD, including examples of the closely related thiourea and guanidine-based structures. A series of compounds containing the isomeric pyridy... Read More about The R-1(2)(6) hydrogen-bonded synthon in neutral urea and metal-bound halide systems.