S. V. Tkachev

Triangular thiocomplexes of molybdenum : reactions with halogens, hydrohalogen acids and phosphines

Abstract The triangular (NH4)2Mo3S13·2H2O complex interacts with Cl2 and Br2 in CH3CN and with concentrated hydrohalogen acids HX (X = Cl, Br and I) retaining its Mo3(μ3-S)(μ-S2)34+ cluster fragment to produce the Mo3(μ3-S)(μ2-S2)3X62− complexes in high yields. IR and Raman spectra of the Mo3S7X62− complexes have been studied. Salts of Mo3S7X62− (X = Cl, Br) containing 92Mo, 100Mo and 34S isotopes and compounds with μ2-(32S-34S) ligands have been also synthesized. For Mo3S7Cl62−, an analysis of the normal vibrations has been performed. The Mo3S7X62− complexes (X = Cl, Br) interact with phosphines (PPh3 and dppe). The reactions proceed with elimination of the μ2-S2 sulfurs to form sulfides of the phosphines and the phosphine complexes Mo3S4X4·3PPh3 and Mo3S4X4·3dppe containing a Mo3S44+ cluster fragment. It has been shown, for the reaction of Mo3(μ3-34S)(μ2-32Se-34Sa)3Cl62− with PPh3, that it is the equatorial μ2-S2 sulfurs that are predominantly eliminated.

Nitrosoruthenium nitrite-nitrate complexes in aqueous and nitric acid solutions as probed by 15N NMR

Aqueous and nitric acid solutions of Na2[Ru15NO(15NO2)4OH] in the concentration range

Volatile Pd–Pb and Cu–Pb heterometallic complexes: structure, properties, and trans -to- cis isomerization under cocrystallization of Pd and Cu β-diketonates with Pb hexafluoroacetylacetonate

c_{H^{15} NO_3 }

Synthesis and structure of the cluster Fe2Mo2(μ3-Se)(μ3-AsMe)(μ3-Co)(μ-Co)(Co)5(η5-Cp)2

= 0–3.3 mol/L have been studied by 15N NMR, dominating complex species have been identified, and the equilibrium constants for the nitrate ion incorporation into the inner coordination sphere of nitrosoruthenium have been estimated. The equilibration time for such equilibria is no more than 2 h at room temperature. In addition to the nitro complexes, isomeric nitritonitronitrosoruthenium compounds have been identified in solutions. In weak acidic solutions at

Pd(II) and Au(I) chloride complexes with tetrakis(butylthiomethyl)calix[4]arene: Synthesis and crystal structures

c_{HNO_3 }

A multinuclear magnetic resonance study of transformations of ruthenium(II) nitrosyl chloride complexes in aqueous solutions

< 0.25 mol/L, nitro and nitritonitro complexes containing four and three coordinated nitrite ions predominate. At the HNO3 concentration 0.4–1.7 mol/L, the vast majority of ruthenium presents in solution as fac-dinitronitrosoruthenium complexes containing coordinated water molecules and nitrate ions. In solutions with