RuNH35NO3

RuNH₃₅NO₃, commonly known as ruthenium(III) hexaammine nitrate, is a coordination compound consisting of a central ruthenium ion coordinated to six ammonia (NH₃) ligands, with a nitrate (NO₃⁻) counterion. This compound belongs to the broader class of coordination complexes, where a metal ion is surrounded by ligands forming a stable structure.

The chemical is notable for its octahedral geometry, where the ruthenium ion (Ru³⁺) occupies the central position and is bonded to six ammonia molecules arranged symmetrically around it. The nitrate ion serves as a counterion to balance the positive charge of the complex cation [Ru(NH₃)₆]³⁺. RuNH₃₅NO₃ is typically synthesized through the reaction of ruthenium salts with ammonia, followed by precipitation with a nitrate source.

This compound is primarily of academic interest, studied for its structural properties and as a model system in coordination chemistry. It exhibits typical characteristics of octahedral complexes, such as geometric and optical isomerism, though RuNH₃₅NO₃ itself is achiral due to its symmetrical arrangement. The compound is soluble in water and can undergo substitution reactions, where ammonia ligands may be replaced by other donor molecules.

RuNH₃₅NO₃ is relatively stable under normal conditions but can decompose upon heating or exposure to strong acids. Its properties align with those of other hexaammine metal complexes, such as cobalt(III) hexaammine nitrate, though ruthenium complexes often exhibit distinct redox behavior due to the variable oxidation states of ruthenium. The compound is rarely encountered in industrial applications but remains a useful reference in studies of ligand-field theory and inorganic chemistry.