METALLOCENOPHANES .7. PREPARATION AND CHARACTERIZATION OF THE DISILVER(I) COMPLEXES OF CONJUGATED POLYENES WITH [2.2.2]PARACYCLOPHANYL END-GROUPS

The preparation of the disilver(I) complexes 3 and 4, polyene metal co mplexes that are terminally substituted with [2.2.2]paracyclophanyl un its, is described. NMR spectroscopic studies on the disilver perchlora te complex 3b showed that (a) the sites of complexation are the cyclop hane groups and (b) the olefinic spacers do not overly perturb the ove rall complexation properties of the individual [2.2.2]paracyclophanyl groups. The crystal structures of the disilver hexafluoroantimonate co mplexes 4a-b were determined. The use of the hexafluoroantimonate coun terion and solvent mixtures containing toluene both proved crucial in obtaining single crystals; toluene is incorportated into the crystal l attices.