Ruthenium trichloride is a chemical substance and its molecular formula is RuCl3. It is a lustrous crystal grain, generally grayish brown or dark red, corrosive and highly deliquescent. Used in heterogeneous catalysis or homogeneous catalysis, electroplating, electrolytic anodes, electronics industry and other important chemical raw materials.
The ruthenium trichloride has two types of α-type and β-type variants and water-soluble RuCl3.
Type α: Black solid, insoluble in water and ethanol.
Beta type: brown solid with a relative density of 3.11, decomposed above 500 °C. It was prepared by a 3:1 mixture of chlorine and carbon monoxide at 330 ° C with a sponge.
The β-form was converted to α-form by heating to 700 ° C in chlorine gas, and the temperature at which the α-form was converted to β-form was 450 ° C.
The water-soluble ruthenium trichloride RuCl3·xH2O is a brown-red crystal. Dissolved in water, acid, alkali, heated to 200 ° C decomposition in air. Its aqueous solution is red. It is obtained by heating and evaporating a solution of ruthenium tetroxide in hydrochloric acid in a stream of hydrogen chloride.
Ruthenium trichloride reacts with many reagents to form a variety of complexes. It is also a starting material for the preparation of many ruthenium complexes, and a catalyst for the polymerization, isomerization, hydrogenation and the like of many organic substances.