The coordination chemistry of pyrazole-derived ligands

Constructing magnetic molecular solids by employing three-atom ligands as bridges

Electrical conduction is well understood in materials formed from inorganic or organic building blocks, but their combination to produce conductive hybrid frameworks and networks is an emerging and rapidly developing field of research. Self-assembling organic–inorganic compounds offer immense potential for functionalising material properties for a wide scope of applications including solar cells, light emitters, gas sensors and bipolar transparent conductors. The flexibility of combining two distinct material classes into a single solid-state system provides an almost infinite number of chemical and structural possibilities; however, there is currently no systematic approach established for designing new compositions and configurations with targeted electronic or optical properties. We review the current status in the field, in particular, the range of hybrid systems reported to date and the important role of materials modelling in the field. From theoretical arguments, the Mott insulator-to-metal transition should be possible in semiconducting metal–organic frameworks, but has yet to be observed. The question remains as to whether electro-active hybrid materials will evolve from chemical curiosities towards practical applications in the near term.

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Conductive metal–organic frameworks and networks: fact or fantasy?

4.04 – Pyrazoles and their Benzo Derivatives

The nature of Cu bonding to natural organic matter

Bonding properties of thiocyanate groups in copper(II) and copper(I) complexes

Mixed-valence copper(I)copper(II) compounds: analysis and classification of crystallographic data

This review summarizes the data for over five hundred and fifty six-, seven- and eight-coordinate Cu(II) coordination compounds. The six-coordinate derivatives are mostly distorted tetragonal (elongation along a single C 4 axis). The seven-coordinate derivatives are only penta-gonal-bipyramidal with different degrees of distortion and the eight-coordinate complexes are dodecahedral. The most common ligands are O- and N-donors. There is a trend for the Cu-L distance to increase with covalent radius of the coordinated atom and also increasing coordination number. In general, Cu(II) compounds “prefer” a monoclinic class and are blue or green. Several relationships were found and discussed. The data are compared and discussed with those of four- and five-coordinate Cu(II) compounds.

Copper(ii) coordination compounds: classification and analysis of crystallographic and structural data ii. mononuclear-, hexa-, hepta-and octacoordinate compounds

This review summarizes the data for over twelve hundred four - and five - coordinate copper(II) coordination compounds. The four-coordinate derivatives are mostly distorted square-planar. The five-coordinate derivatives are mostly square-pyramidal. The most common ligands are oxygen- and nitrogen- donors. There is a trend for the Cu-L distance to increase with covalent radius of the coordinated atom and also increasing coordination number. There are three types of isomerism - distortion, cis- and trans- and configuration. Several relationships are found and discussed.

M. Dunaj-Jurco

Papers

Bonding properties of thiocyanate groups in copper(II) and copper(I) complexes

Mixed-valence copper(I)copper(II) compounds: analysis and classification of crystallographic data

Copper(ii) coordination compounds: classification and analysis of crystallographic and structural data ii. mononuclear-, hexa-, hepta-and octacoordinate compounds

Copper (ii) coordination compounds: classification and analysis of crystallographic and structural data

The crystal structure of the copper(II) dicyanato-2,4-lutidine complex