Addition of H₂ across the cobalt–phosphorus bond of (PPP)CoPMe₃ (3) is demonstrated, where PPP is a monoanionic diphosphine pincer ligand with a central N‐heterocyclic phosphido (NHP⁻) donor. The chlorophosphine Co^II complex (PP^ClP)CoCl₂ (2) can be generated through coordination of the chlorophosphine ligand (PP^ClP, 1) to CoCl₂. Subsequent reduction of 2 with KC₈ in the presence of PMe₃ generates (PPP)CoPMe₃ (3), in which both the phosphorus and cobalt centers have been reduced. The addition of 1 atm of H₂ to complex 3 cleanly affords (PP^HP)Co(H)PMe₃ (4), in which H₂ has ultimately been added across the metal–phosphorus bond. Complex 4 was characterized spectroscopically and using computational methods to predict its geometry.

中文翻译：

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在钴-磷键上加氢

的小时加入₂跨越（PPP）CoPMe的钴-磷键₃（3）证明，其中PPP是具有中央N-杂环膦（NHP的单阴离子的二膦配体钳形^- ）供体。可以通过将氯膦配体（PP ^Cl P，1）与CoCl ₂配位生成氯膦Co ^II络合物（PP ^Cl P）CoCl ₂（2）。随后在PMe ₃存在下用KC ₈还原2可生成（PPP）CoPMe ₃（3），其中磷和钴中心都被还原了。向配合物3中添加1个大气压的H ₂可以干净地获得（PP ^H P）Co（H）PMe ₃（4），其中最终在金属-磷键之间添加了H ₂。对配合物4进行了光谱表征，并使用计算方法预测了其几何形状。