UV (254 nm) photolysis of OsH4P3 (P PMe2Ph) proceeds, by photodissociation of H2, to give the transient OsH2P3. This species exchanges deuterium with C6D6, reacts with phosphine to give cis-H2 OsP4, and with OsHxP3 to give us Os2H2(μ-H)2P6, whose structure was determined by X-ray diffraction. This OsOs dimer participates in a unique reversible (25°C) phosphin dissociation equilibrium to produce Os2H4P5, containing an OsOs bond. A structural analog of this dimer was produced by acidolysis of Os2H4P6 to give Os2H3P6+, which X-ray diffraction reveals to have a P3Os(μ-H)3OsP3+ structure.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry
- Materials Chemistry