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Three distorted tetrahedral Dy(iii) aryloxide complexes, [Na(THF)6][Dy(OArAd2tBu)2Cl2] (1) (OArAd2tBu = OC6H2Adamantyl2-2,6-tBu-4) and [Na(THF)6][Dy(OMes*)3X] (X = Cl, 2; BH4, 3), (OMes* = OC6H2tBu3-2,4,6) exhibit easy axis magnetic anisotropy and slow magnetic relaxation at zero field, with relaxation rates 1 < 2 < 3., Magnetostructural correlations: The magnetic relaxation dynamics of three distorted tetrahedral dysprosium aryloxide complexes are shown to vary according to their local coordination environments.

An unprecedented near-linear bis(amide) f-element complex has been prepared by utilizing bulky silylamide ligands. This Sm(ii) complex is a blueprint for the next generation of single molecule magnets, where predictions for the Dy(iii) analogue suggest they could operate above 77 K.

The synthesis, structural characterisation and preliminary magnetic studies of a Co12 wheel are reported; the magnetic investigations reveal that the electronic ground state has a spin S = 6, which corresponds to ferromagnetic interactions between the twelve Co(II) ions.

Two new octanuclear cages are reported which feature formate as a bridging carboxylate which has been formed in situ from decomposition of triphenylacetate used as a ligand.

Pentametallic Ln complexes of formula [Ln(5)O(O(i)Pr)(13)] have been made, where Ln(III) = Sm, Gd, Tb, Ho and Er; slow magnetisation relaxation to 33 K is observed for the Ho complex with an energy barrier of ca. 400 K.

Hexametallic chromium(III) chains can act as fluoride donor ligands to lanthanide ions giving {(Cr(6))Ln(x)}(n) complexes; preliminary spectroscopic studies are reported.

A cyclic dodecanuclear nickel complex is the first single molecule magnet based on nickel(II) centres; the material is also the highest spin molecule to show resonant quantum tunnelling of magnetisation.

The synthesis and crystal structure of decanuclear Co and nonanuclear Ni cages are reported: the cages feature carboxylate and pyridonate ligands and demonstrate that inter-ligand repulsions can lead to novel structures.

The synthesis and structural characterisation of a novel metal polyhedron is reported, involving chromium(III) and isobutyrate; comparison of this product with those obtained using different carboxylates suggests that the leaving group—which can be carboxylate, water or both—strongly influences the structure found.

A new class of oxygen donor ligands is described and preliminary results using these ligands are given which show they can be used to make polymetallic cages.

Synthetic and structural studies of Cr horseshoes are reported which show that these compounds demonstrate a rich supramolecular chemistry through H-bonding interactions, and can act as ligands for metal clusters.

Neutron diffraction, magnetic susceptibility and EPR spectroscopic studies of a dodecanuclear chromium cage are reported which show the molecule has an S = 6 spin ground state; this is the highest spin ground state known for a cage of this metal.

The synthesis of a series of heterometallic rings and chains is reported. The family is based on the octanuclear cages of general formula [H(2)NR(2)][M(7)M'F(8)(O(2)CR')(16)], where M is a trivalent metal (Cr, Fe, V, Al, Ga or In), M' is a divalent metal (Mn, Fe, Co, Ni, Mg, Zn, Cd), R is a linear alkyl chain and O(2)CR' is one of around twenty carboxylates. Other members of the family with nonametallic and decametallic cores are described, and some new physics is outlined, including initial investigations of the proposed application of [Cr(7)Ni] rings as Qubits in quantum information processing.

The highest nuclearity complex containing cobalt consists of cubic-close packed planes of hydroxide, methoxide or chloride anions, bridging cobalt(II) centres; preliminary magnetic studies indicate a high-spin ground state and the possibility of superparamagnetic behaviour.

Heterometallic wheels can be templated about tertiary amines and imidazoles, leading to new octa-, nona- and deca-nuclear rings.

An unusual {Ni21Ag} cluster is reported and demonstrates the importance of examining the "counter-ion" present in all reactions involving polymetallic complexes.

Four new Co complexes are reported which illustrate routes to high nuclearity species; these include a dodecanuclear ‘chain of cubes’ and a tridecanuclear species which features a tetranucleating phthalate ligand.

The hydrothermal reaction of manganese dichloride with the potassium salt of benzene-1,3,5-tricarboxylic acid at 220 °C gives [Mn3{C6H3(CO2)3-1,3,5}2] which exhibits two pathways for antiferromagnetic coupling.