By Vincenzo Balzani, Paola Ceroni (auth.), Prof. Luigi Fabbrizzi, Prof. Antonio Poggi (eds.)

This quantity is predicated at the Lectures offered on the assembly "Chemistry at the start of the 3rd Millennium", wh ich used to be held in Pavia, Italy, in the course of the interval 7-10 October, 1999. The assembly concerned the participation of scientists from German and ltalian Universities of the 'Coimbra Group'. The 'Coimbra Group', wh ich was once based in 1987, gathers the main historical and prestigious eu Universities, with the purpose to advertise projects in either learn and instructing and to supply instructions for the development and improvement of the collage method. German and Italian Universities in the Coimbra crew suggest each year a subject matter for clinical dialogue, which originates a gathering to be held in a German or Italian college. The assembly in Pavia used to be the 5th of the sequence and these of Bologna (1995), Jena (1996), Siena (1997), Heidelberg (1998). each one assembly is focused on a subject from both humanistic or typical sciences and is composed in aseries of lectures awarded through unique scientists from the six participanting Universities. For the Pavia assembly, the guidance Committee selected Chemistry because the subject and accrued researchers with event in just about all fields of chemistry. specifically, through the assembly, lectures have been awarded on many updated topics of chemistry, together with: fabrics technological know-how, superconductors, supramolecular chemistry, bioinorganic chemistry, fullerenes, liquid crystals, photoinduced electron move, and so on. the several issues have been lined via unusual and renown researchers of many of the fields.

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Extra info for Chemistry at the Beginning of the Third Millennium: Molecular Design, Supramolecules, Nanotechnology and Beyond Proceedings of the German-Italian Meeting of Coimbra Group Universities Pavia, 7–10 October, 1999

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Chang, L. Jones II, C. Wang, L. M. Henling, R. H. Grubbs, Organornetallics 1998, 17,3460. a) E. L. Dias, R. H. Grubbs, Organometallics 1998, 17, 2758; b) A. Fürstner, K. Langemann, 1. Arn. Chern. Soc. 1997,119,9130. a) J. Huang, E. D. Stevens, S. P. Nolan, 1. L. Petersen,1. Arn. Chern. Soc. 1999,121, 2674; b) T. Weskamp, F. J. Kohl, W. Hieringer, D. Gleich, W. A. Herrrnann, Angew. Chern. Int. Ed. 1999,38,2416; c) M. Scholl, T. M. Trnka, J. P. Morgan, R. H. Grubbs, Tetrahedron Lelt. 1999,40,2247 d) M.

Based upon available mechanistic and theoretical studies of Grubbs type trans-(PR3)2CI2Ru=CHR' compounds [6b, 11], the investigation of complexes with chelating bisphosphine ligands, enforcing cis coordination of two phosphorus atoms at the metal center, seemed interesting for various reasons, as will be discussed in detail below. ßU2 (dtbpm) as a ligand, enabled us to prepare neutral cis-(K 2-dtbpm)CI2Ru=CHR [12] (1) as weIl as a novel cIass of cationic RUH carbene complexes, [(K2-dtbpm)(Il-Cl)Ru=CHRlzC03SCF3)2 [13] (2), which are most efficient catalysts in ROMP reactions (Fig.

De Abstract. Stabilities, reactivities and e1ectronic properties of transition metal coordination compounds are related to the number and type of donor groups and to their geometric arrangement. Carefully designed rigid ligands may be used to enforce specific coordination geometries, reactivities and stabilities. Applications range from metal ion discrimination and stereoselective coordination of substrates to compounds with unique spectroscopic and electrochemical properties, to low molecular weight structural and spectroscopic models of metalloproteins and to catalytically active coordination compounds.

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