Reaction of the appropriate Sr-3(M0.5Ru0.3)(2)O-7 (M = Ti, Mn, Fe), n = 2, Ruddlesden-Popper oxide with CuF2 under flowing oxygen results in formation of the oxide-fluoride phases Sr-3(Ti0.5Ru0.3)(2)O7F2 Sr-3(Mn0.5Ru0.5)(2)O7F2, and Sr-3(Fe0.5Ru0.5)(2)O5.5F3.5 via a topochemical anion insertion/substitution process. Analysis indicates the titanium and manganese phases have Ti4+, Ru6+ and Mn4+, Ru6+ oxidation state combinations, respectively, while Mossbauer spectra indicate an Fe3+, Ru5.5+ combination for the iron phase. Thus, it can be seen that the soft fluorination conditions employed lead to formation of highly oxidized Ru6+ centers in all three oxide-fluoride phases, while oxidation states of the other transition metal M cations remain unchanged. Fluorination of Sr-3(Ti0.5Ru0.3)(2)O-7 to Sr-3(Ti0.5Ru0.5)(2)O7F2 leads to suppression of magnetic order as the fluorinated material approaches metallic behavior. In contrast, fluorination of Sr-3(Mn0.5Ru0.3)(2)O-7 and Sr-3(Fe0.3Ru0.5)(2)O-7 lifts the magnetic frustration present in the oxide phases, resulting in observation of long-range antiferromagnetic order at low temperature in Sr-3(Mn0.5Ru0.5)(2)O7F2 and Sr-3(Fe0.5Ru0.5)(2)O5.5F3.5. The influence of the topochemical fluorination on the magnetic behavior of the Sr-3(M0.5Ru0.5)(2)OxFy phases is discussed on the basis of changes to the ruthenium oxidation state and structural distortions.