Colorimetric fluoride detection in dimethyl sulfoxide using a heteroleptic ruthenium(ii) complex with amino and amide groups: X-ray crystallographic and spectroscopic analyses.

A bis-heteroleptic ruthenium(ii) complex, [Ru(Hdpa)(Hpia)]X (1·X; X = Cl, OTf, or F; Hdpa = di-2-pyridylamine; Hpia = 2-pycolinamide; OTf = CFSO ), was synthesized and spectroscopically and crystallographically characterized. The crystal structures of 1·Cl·2.5HO and 1·F·2EtOH revealed essentially identical geometries for the 1 dication; however, the dihedral angle between the two pyridyl groups in the Hdpa ligands, which represented the degree of bending of the bent conformation, was affected by hydrogen-bonding interactions between the NH group and counterions.

Syntheses and Characterization of a Pair of Isomers of Heteroleptic Bis(Bidentate) Ruthenium(II) Complexes with Two Different Monodentate Ligands.

Two isomers of heteroleptic bis(bidentate) ruthenium(II) complexes with dimethyl sulfoxide (dmso) and chloride ligands, trans(Cl,N )- and trans(Cl,N )-[Ru(bpy)Cl(dmso-S)(Hdpa)] (bpy: 2,2'-bipyridine; Hdpa: di-2-pyridylamine), are synthesized. This is the first report on the selective synthesis of a pair of isomers of cis-[Ru(L)(L')XY] (L≠L': bidentate ligands; X≠Y: monodentate ligands). The structures of the ruthenium(II) complexes are clarified by means of X-ray crystallography, and the signals in the H NMR spectra are assigned based on H- H COSY spectra.

Synthesis and characterization of trans-[Os(en)2py(H)]2+ and related studies.

trans-[Os(en)(2)pyH](Otf)(2), 2, is recovered from an acidic solution of trans-[Os(en)(2)py(H(2))](OTf)(2), 1, which has been subjected to one electron oxidation. The structures of both 1 and 2 have been determined by single crystal X-ray analysis. In cyclic voltammetry, 2 shows a one electron oxidation wave at 0.