Synthesis and characterization of [OsH(PNP)(bipy)]⁺ (PNP=N(CHCHP^tBu₂)₂) are reported, as the second osmium(III) hydrido complex next to [OsH(en)₂(py)]²⁺. While the osmium(II) precursor, [OsH(PNP)(bipy)], exhibits two reversible oxidations in the cyclic voltammogram, the product from 2-electron oxidation could not be isolated due to rapid decay. Thermochemical examinations attribute the stability of the osmium(III) hydride to both thermodynamic and kinetic reasons. In contrast, the high estimated acidity of [OsH(PNP)(bipy)]²⁺ presumably leads to rapid decay.

中文翻译：

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锇(III)氢化物络合物的分离

报道了[OsH(PNP)(bipy)] ⁺ (PNP=N(CHCHP ^t Bu ₂ ) ₂ ) 的合成和表征，它是继 [OsH(en) ₂ (py)]之后的第二个锇 (III) 氢化物配合物²⁺。虽然锇(II)前体[OsH(PNP)(bipy)]在循环伏安图中表现出两次可逆氧化，但由于快速衰变，无法分离出双电子氧化产物。热化学检查将氢化锇（III）的稳定性归因于热力学和动力学原因。相反，[OsH(PNP)(bipy)] ²⁺的高估计酸度可能导致快速腐烂。