The synthesis and characterization of two [Ru(L)(O)(trpy)](ClO4)(2) complexes (where trpy = 2,2’:6’,2 "-terpyridine and L = (S)- or (R)-bpop = 2,2-bis[2-[4(S)- or 4(R)-phenyl-1,3-oxazolinyl]]propane) are described. These complexes are among the first high oxidation state oxoruthenium complexes which contain an optically active ligand fixed in a position cis to the oxo moiety. The preparations of the precursor materials, [Ru(L)(Cl)(trpy)]-(BF4) and [Ru(H2O)(L)(trpy)](BF4)(2), are also described. A single-crystal X-ray diffraction analysis of [Ru((S)-bpop)(Cl)(trpy)](BF4) was undertaken. The crystals belong to the monoclinic system, space group P2(1), with a = 12.1507(16) Angstrom, b = 12.3633(10) Angstrom, c 12.4606 (14) Angstrom, beta = 113.332(9)degrees. V = 1718.9(3) Angstrom(3), and Z = 2. The structure was solved and refined to R = 2.28% and R(w) = 2.98% for all 6085 independent reflections. (R = 1.99% for those 5680 reflections with F-0 > 6 sigma(F-0).) This is the first report of a (bis(oxazoline))ruthenium single-crystal X-ray structural analysis. To establish the viability of these complexes for ligand effect studies, the pK(2) value of the bpop ligand was measured along with the rate constant for the ligand substitution of the aqua ligand of [Ru(H2O)((R)-bpop)(trpy)](ClO4)(2) by acetonitrile. Our initial substrate oxidation studies of these new (bis(oxazoline))oxoruthenium (IV) complexes with methyl p-tolyl sulfide or racemic methyl p-tolyl sulfoxide yield results consistent with our previous mechanistic studies on sulfide and sulfoxide oxidations with oxo(phosphine)ruthenium (IV) complexes.