Labile interactions in aza-aromatic base adducts of lead(II) thenoyltrifluoroacetonate

The polymeric form of lead(II) thenoyltrifluoroacetonate, [Pb(ttfa)(2)], is modified by adduct formation with 2,2'-bipyridine (bipy) and 1,10-phenanthroline (phen) to give, in both cases, dimeric species [Pb-2(bipy)(2)(ttfa)(4)] and [Pb-2(phen)(2)(ttfa)(4)], respectively. Crystal structure determinations indicate that labile interactions involving the fluorine atoms and both the thenoyl and aza-aromatic moieties may be important in determining the lattice arrays of these dimers, which are very similar, even though the dominant lattice forces may differ.