Polyhedra supramolecular

Catherine E. Housecroft was born in Bradford (UK) and studied at the University of Durham where she obtained a BSc (1976) and PhD (with Ken Wade, 1979) in chemistry. After a postdoctoral period with Tom Fehlner (University of Notre Dame), she was an Assistant Professor at the University of New Hampshire before moving to the University of Cambridge (Fellow of Newnham College), where she held a Royal Society University Research Fellowship before becoming a University Lecturer. In 1993, she moved to the University of Basel where (apart from two years at Birmingham University) she has remained and is currently a Professor of Chemistry. Research interests span organome-tallic, coordination and supramolecular chemistries. In addition to over 250 research publications and reviews, she is the author of a number of textbooks. She is also an editor of Polyhedron and has been a volume editor both for COMCII and COMCIII. 

Figure 26.14 Supramolecular chirality provided by the tilt of the elements, (a) An enantiomorphic pair of polyhedrons,...

The examples presented in this section illustrate an elegant approach by Stang and coworkers to the design of chiral supramolecular polygons (squares, cages) and also chiral three-dimensional polyhedrons. The combination of tailored ligand connectors with the metal corners derived from the BINAP framework should allow the preparation of a variety of different supramolecular chiral objects. 

Masci, B. Gabrielli. M. Mortera. S.E. Nierlich. M. Thuery, P. Hydrogen bonded supramolecular assemblies from uranyl ion complexes of tetrahomodioxacalix[4]ar-enes with various counterions. Polyhedron 2002, 21 (11). 1125-1131. 

Huang, S.D. Xiong, R.G. Molecular recognition of organic chromophores by coordination polymers Design and construction of nonlinear optical supramolecular assemblies. Polyhedron 1997. 16 (22). 3929. 

Haiduc, I. Sowerby, D.B. Lu. S.F. Stereochemical aspects of phosphor-1,1-dithiolato metal eomplexes (dithiopho-sphates, dithiophosphinates) Coordination patterns, molecular structures and supramolecular associations. Polyhedron 1995, 14. 3389. 

Edelmann. F.T. Haiduc, O. Schmidt. H.-G. Noltemeyer, M. Silvestru, C. Supramolecular self-assembly in tri-phenyllead(IV) dimethyldithiophosphinate, x [Ph3PbS2-PMea], a chain polymer built through intermolecular Pb S secondary bonds. Polyhedron 1998. 17. 2043. 

Casas. J.S. Castiiieiras, A. Haiduc. L Sanchez. A. Sordo. J. Vazquez-Lopez, E.M. Supramolecular self-organization in c /r n<7-poly[(dimethylphosphinothioato) thallium(III)], [TlMe2 S(0)PPh2 ]n, a polymer with secondary interactions between the chain segments. Polyhedron 1994. 13. 1805. 

The perspectives provided by Lehn s supramolecular chemistry (3,7) and Cram s host/guest complexation (4) do indeed broaden the realm of coordination chemistry, but the focus still remains on a molecular coordination entity. On the other hand, the coordination polyhedron has lost its pivotal position in the broad definition of coordination chemistry. Furthermore, all manner of intermolecular interactions and interacting pairs are included, and the forces included range from van der Waals and subtle hydrophobic interactions through strong covalent bonds. Coordination chemistry demands only that the molecular entities that unite to form the complex still be recognizable substructures within the complex (6). It is particularly instructive, at this point, to examine examples of coordination entities formed by various modes of interaction that were not recognized in traditional coordination chemistry. 

Fig. 1 The directional bonding method fragments a target polygon or polyhedron (a) at logical breaking points (b) to define the angularity and directionality of individual precursors (c) which can be combined in specific ratios to generate a supramolecular analogue (d)...

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