trans-Diaquabis(2,2'-bipyridine-N,N')ruthenium(II) Bis(hexafluorophosphate)

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“…In bis(bipyridine) or bis(phenanthroline) systems the cis configuration is believed to be favoured because of the interaction of the hydrogen atoms attached to the carbon atoms adjacent to the donor atoms in a trans arrangement. While the trans arrangement is found in bis(bipyridine) derivatives of the larger ruthenium(II) ion, albeit with considerable bowing of the ligand, 19 there would seem to be no reports for iron(II) or other first transition series metal ions. An apparent exception to this is trans-Cu(dafone) 2 Cl 2 (dafone = 4,5-diazafluoren-9-one) in which the N-N bidentate ligand can be regarded as a phenanthroline derivative with the central ring being five-membered.…”

trans-Diaquabis(2,2′-bipyridine-κ2N,N′)ruthenium(II) bis(trifluoromethanesulfonate)

“…For the crystal structures of related compounds, see: Weathers et al (1997); Durham et al (1980); Klü fers & Zangl (2007). For a comparative discussion, see the Comment section in the Supplementary materials.…”

“…Although the trans isomer is usually obtained from the photo-induced isomerization of the more common cis isomer (Durham et al, 1980;Walsh & Durham, 1982), formation of the trans isomer as a by-product in synthetic preparations involving the cis-Ru(bpy) 2 moiety has also been reported (e.g. Weathers et al, 1997).…”

trans-Bis(2,2′-bipyridine)dichloridoruthenium(II)

“…The five-membered chelate ring Ru-N1-C5-C6-N2 adopts an envelope conformation on Ru (Q 2 = 0.2785 (17) Å, φ 2 = 184.3 (5)°). Ring-puckering parameters (Cremer & Pople, 1975) were calculated with PLATON (Spek, 2003).Bond lengths and angles are comparable to similar compounds (Weathers et al, 1997).The molecular packing is shown in Fig. 2 which shows a layer of molecules of (I) in the bc plane.…”

“…Sullivan et al (1978) describe the corresponding cis-coordinated complex which was used as the starting material for the synthesis of the title compound. Weathers et al (1997) describe a related complex cation with the chlorido ligands of the title compound substituted by aqua ligands. For ring puckering analysis, see: Cremer & Pople (1975).…”