Portal de Periódicos da CAPES

Tetrakis(pyridine)ruthenium Trans Complexes of Phenylcyanamide Ligands: Crystallography, Electronic Absorption Spectroscopy, and Cyclic Voltammetry

1999; American Chemical Society; Volume: 38; Issue: 25 Linguagem: Inglês

10.1021/ic990717r

1520-510X

P. Desjardins, Glenn P. A. Yap, Robert J. Crutchley,

Inorganic and Organometallic Chemistry

The complexes trans-[Ru(py)4L2] where py = pyridine and L = (2-chlorophenyl)-, (2,3-dichlorophenyl)-, (2,4,5-trichlorophenyl)-, (2,3,4,5-tetrachlorophenyl)- and (pentachlorophenyl)cyanamide were synthesized and characterized by electronic and 1H NMR spectroscopies. A crystal structure of trans-[Ru(py)4((2-chlorophenyl)cyanamide)2] showed the expected trans coordination of the phenylcyanamide ligands. Crystal structure data: space group C2/c, with a, b, and c = 40.6441(3), 9.2003(1), and 22.6946(2) Å, respectively, β = 116.387(1)°, V = 7602.2(1) Å3, and Z = 8. The structure was refined by using 4943 independent reflections with I > 2σ(I) to a final R factor of 0.060. Spectroelectrochemistry was used to generate the electronic absorption spectra of the Ru(III) complexes trans-[Ru(py)4L2]+. Ru(III)−cyanamide coupling elements derived from charge transfer spectral data of the trans-[Ru(py)4L2]+ complexes were significantly larger than those of the corresponding [Ru(NH3)5L]2+ complexes.