Crystal and molecular structure of tris(2,2'-bipyridyl)osmium(II) bis(hexafluorophosphate)

Abstract

Experimental. [Os(bpy)3](PF6)2 (bpy = 2,2'-bipyridine) was prepared by a modification of the procedure of Burstall, Dwyer & Gyarfus (1950), and its properties have been reported elsewhere (Richter & Brewer, 1991). Recrystallization was accomplished using the technique of vapor diffusion (Stout & Jensen, 1968), with the compound dissolved in acetonitrile and using ether as the precipitating solvent. The crystals were large, thick, purple hexagons and had to be cut for the X-ray experiment.An irregularly shaped crystal with dimensions of 0.41 × 0.25 × 0.17 mm was selected for data collection on a Syntex P2~ diffractometer, with graphite monochromator, upgraded to Nicolet R3 specifications (Campana, Shepard & Litchman, 1981). The structure solution was obtained via the direct methods routine SOL V in the SHELJ(TL crystallo-

Intramolecular mini-excitons in the series [Os(bpy)3-x(bpy-d8)x]2+(x= 0-3 in [Zn(bpy)3](ClO4)2and [Ru(bpy)3](ClO4)2(bpy = 2,2′-bipyridine)

“…Thus fl ,~ 79 cm -1 and fl ,~ 77 cm -1 for level II in the [Zn(bpy)3](CIO4) 2 and [Ru(bpy)3](CIO4) 2 hosts, respectively 9 We then assign 03 and O 1 to the Davidov components of the lowest exciton level I in the perdeuterated and perprotonated complexes. The excitation coupling is weaker in this level I and we obtain a value offl ,~ 37"5 cm -~ for both hosts.…”

“…This simple calculation can provide only the order of magnitude of the energy difference of the charge transfer transitions to the two types of ligands, and will apply Downloaded by [University of California, San Diego] at 19:27 03 January 2015 [8,9].…”

Structure and Lateral Electron Hopping in Osmium-tris-4,7-diphenylphenanthroline Perchlorate Monolayers at the Air/Water Interface

“…31 We assume that Os(DPP) 3 and Ru(DPP) 3 are isostructural, just as are a number of other bidentate octahedral Os and Ru complexes. [32][33][34][35] In 3D, Ru(DPP) 3 chloride crystallizes in a monoclinic space group P2 1/c with the cell dimensions a ) 13.085 Å, b ) 24.173 Å and c ) 22.773 Å, and ) 110.91°. 31 The distances between nearest Ru-Ru neighbors range from 13.085 to 16.576 Å.…”

Characterization of excited electronic and vibronic states of platinum metal compounds with chelate ligands by highly frequency-resolved and time-resolved spectra

“…[Os(bpy)3] 2+ or related Os(II)-compounds have been studied less frequently than [Ru(bpy)3] 2 § but there are a number of very interesting investigations in physical, chemical, and biological research fields [21,[271][272][273][274][275][276][277]. Moreover, Os(II)-bipyridine complexes represent suitable building blocks in connection with Ru(II)-polypyridine compounds for supramolecular systems [278,279] [280][281][282][283].…”