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The article explains the chemistry, as well as the structural and functional evolution of various metallocrowns (MC). These compounds are found to be very useful as single molecule magnets and MRI contrast agents.

The use of reversible coordination to unsaturated transition metal complexes as receptor binding sites in molecular recognition is discussed. It is concluded that coordinatively unsaturated transition metal complexes are well established as binding sites for synthetic receptors.

A historic approach to asymmetric catalysis with chiral Lewis acid-box complexes (C2-symmetric bis(oxazolines)) is followed in a review that covers the literature from 1991 to the spring of 2005. It is concluded that box -based catalysts are not only efficient but are also clever molecular robots whose behavior can also be predicted.

A linear log-log relationship should exist between the rate constants k(sub el) for heterogeneous electron transfer of transition-metal complexes at solid electrodes and k(sub ex) for the corresponding self-exchange reactions in homogeneous solution. Methods of measuring electrode reaction rates and the basic theoretical background are presented.

The authors review the publications on compounds containing monoanionic N,N-dialkylcarbamato ligand. The topics include the analysis of ammonia/CO (sub)2 amd amine/CO (sub)2 systems, and N,N-dialkylcarbamato metal complexes and their applications.

The authoirs review the publications on metal carbonyl complexes. The topics include the analysis of the syntheses of these complexes and clusters mediated by the inorganic oxides' surface.