Syntheses, characterisation and some ligand substitution chemistry of Ru(ii)–diphosphine triflate complexes

Syntheses and characterization of novel ruthenium complexes based on 1,3-dicyanobenzene

“…The 31 P NMR spectrum of 3 indicated the expected septet at À143.8 ppm with J( 31 P-19 F) = 711 Hz for the PF 6 À counter ions, and only one singlet (at 42.5 ppm), corresponding to the trans arrangement of phosphorus atoms around ruthenium. This is in good agreement with the literature, where the similar bis-(acetonitrile) complex, trans-[Ru(CH 3 CN) 2 (dppe) 2 ][OTf] 2 , also adopted the trans isomer [13]. Bickley et al suggested that the slightly greater steric demand for the five-membered chelate rings favours attainment of the trans geometry with the dppe ligand.…”

“…Similar 31 P NMR patterns were observed for the previously described, related acetonitrile complexes, cis-[RuCl(CH 3 CN)(dppm) 2 ]X, (X = BF 4 [12], X = PF 6 [11]). The bis-(acetonitrile) complexes, cis-[Ru(CH 3 CN) 2 (dppm) 2 ]X 2 (X = OTf [13], X = PF 6 [11]), also retained this stereochemistry with the four-membered ring diphosphine. However, the Higgins' group observed that the stereochemical outcome of ligand substitution reactions in related complexes can often be controlled simply by the order of addition of the reagents [12,39].…”

“…The chemistry of ruthenium(II) phosphines with simple, monodentate nitriles (i.e. acetonitrile) has been thoroughly investigated [11][12][13][14][15] and also a series of ruthenium(II) dihydrogen complexes have been prepared [16,17]. Garcia et al synthesised a series of iron(II) and ruthenium(II) nitrile complexes [18][19][20][21], as model donoracceptor systems, to probe the effects of structural variation on non-linear optical (NLO) properties [22,23].…”

Synthesis, characterization, EXAFS investigation and antibacterial activities of new ruthenium(III) complexes containing tetradentate Schiff base

“…4 and the corresponding structural parameters are summarized in Table 4. In the analyses of the complexes [54][55][56]. In the case of complex 3, a well-defined sulphur shell with coordination number of two could be fitted at about 2.29 Å distance, as this complex does not have phosphorus or chlorine backscatterers.…”

Preparation and Characterization of Novel Poly(alkylidenamine) Nitrile Ruthenium Metallodendrimers

“…The 31 P NMR spectra of 10 and 11 are quite similar, both having the expected multiplet at -144. 18 [15] The expected ratio of protons for the tetracoordinate product (complex/core) was observed in the 1 for 11. All our efforts to obtain single crystals suitable for X-ray diffraction from the reported compounds were unsuccessful, probably due to the flexibility of the nitrile poly(alkylidenamine) system.…”