150392-41-9Relevant articles and documents
Reversible binding of water, methanol, and ethanol to a five-coordinate ruthenium(ii) complex
Ma, Erin S. F.,Patrick, Brian O.,James, Brian R.
, p. 4291 - 4298 (2013)
The known green, five-coordinate, square-pyramidal trans-RuCl 2(P-N)(PPh3) complex reversibly binds water, MeOH and EtOH in the vacant coordination site in the solid state and in CH2Cl 2 solution to give pink adducts (P-N = o-diphenylphosphino-N, N′-dimethylaniline). The adducts are well characterized, including X-ray analysis of the aqua complex, trans-RuCl2(P-N)(PPh 3)(H2O), which crystallizes in two different benzene-solvated forms. Comparison of the structural data with those determined previously for the binding of H2S, thiols, and H2, which form cis-RuX2(P-N)(PPh3)L products (X = Cl, Br; L = a S-ligand or H2) reveals the trans-influence trend P > H 2S ~ thiols > H2 > Cl ~ Br > H 2O. Thermodynamic data for the binding of water were estimated in solution by UV-Vis spectroscopy, and ΔHo data for the aqua and alcohol adducts in the solid state were obtained by differential scanning calorimetry. Inclusion of published data for the S-ligand adducts reveals the thermal stability trend of the solid complexes as MeSH > MeOH > H 2S > H2O > EtSH > EtOH.