Cover Picture: Tris(pyrazolyl)methanesulfonates: More Than Just Analogues of Tris(pyrazolyl)borate Ligands; N,N,N‐, N,N,O‐, and Other Coordination Modes (Eur. J. Inorg. Chem. 11/2003)

Abstract

AbstractThe cover picture shows two isomers of a carbonylcopper(I) complex of the new ligand tris(pyrazolyl)methanesulfonate (Tpms). This new class of ligands contains three nitrogen donor atoms and in addition a sulfonate group which makes the ligands more hydrophilic. The sulfonate group can act as a competing donor centre. Therefore Tpms ligands are ambidentate ligands, that can adapt their coordination modes according to the electronic preferences of the metal centre. In solution, e.g., carbonylcopper(I) and zinc halide complexes show an equilibrium between the N,N,N‐ and N,N,O‐coordination mode. Synthesis, characterization and the dynamic stereochemistry of Tpms and TpmstBu complexes are presented in the article by W. Kläui et al. on p. 2059 ff. We thank B. Kugel and P. Kunz for their help with the cover picture.