Molecular design using electrostatic interactions. Part 3: Synthesis and properties of chromium tricarbonyl complexes of cationic mono-, di- and tripodands

Water soluble polycationic arene host systems have been prepared, using DAB CO as the source of the cationic charge, in which the arena group is comple xed to chromium tricarbonyl. Association constants for two salts were deter mined by NMR methods and the role of IR carbonyl band of the Cr(CO)(3) moei ty as reporter group explored. The different properties of the salts in the solid state, in water and, where possible, organic solvents were examined and it was found that the nature of the anion had no effect on the carbonyl IR band in water, although it did in the solid state. (C) 2001 Elsevier Sc ience Ltd. All rights reserved.