Diruthenium Formamidinato Complexes

New insights into progressive ligand replacement from [Ru2Cl(O2CCH3)4]: synthetic strategies and variation in redox potentials and paramagnetic shifts

“…The cis -configuration is found in most of the diformamidinato compounds, except when the steric effects are meaningful. 55 When using D p -FPhF − as the ligand, the repulsive effects are not expected to be significant, and so the cis -configuration is anticipated and the procedures described in the literature for this type of compounds were used as a starting point. The synthesis of di-substituted complexes with a cis -configuration has been carried out using THF as the solvent, excess of LiCl and Et 3 N, and [Ru 2 Cl(O 2 CCH 3 ) 4 ] : formamidine in an approximate ratio of 1 : 2.…”

Diruthenium complexes as pH-responsive delivery systems: a quantitative assessment

“…[Ru 2 Cl(μ-O 2 CMe) 4 ], 43 N , N ′-bis( p -methoxy)phenylformamidine (HDAniF), 44 Ru2,4-D and RuNAA 39 were prepared according to published procedures. [Ru 2 Cl(μ-DAniF) 3 (μ-O 2 CMe)] was also prepared following a reported procedure, 45 slightly modified to avoid the use of benzene in the purification steps, employing acetone and toluene instead. The rest of reactants and solvents were obtained from commercial sources and used as received.…”

pH- and Time-Dependent Release of Phytohormones from Diruthenium Complexes

“…The use of amidinate ligands, which have a higher donor character in comparison to carboxylates, allows isolation of not only Ru 2 4+ and Ru 2 5+ compounds but also Ru 2 6+ compounds. , Again, the Ru 2 5+ oxidation state is the most common one in this family of compounds. Furthermore, heteroleptic compounds with different ratios of carboxylate/amidinate bridging ligands can be prepared by varying the synthetic conditions employed . Depending on the nature of the ligands, it is possible to obtain Ru 2 5+ compounds with high (Qπ *2 δ*), low (Qδ *2 π* or Qπ *3 ), or intermediate-spin configurations …”