Chemistry - A European Journal, Год журнала: 2023, Номер 29(66)
Опубликована: Авг. 31, 2023
Abstract The reactions of two complexes [( R NHP)Mn(CO) 4 ] ( NHP=N‐arylated N‐heterocyclic phosphenium) with H 2 at elevated pressure (≈4 bar) were studied by NMR spectroscopy. Irradiation UV light initialized in one case 5 a , R=Dipp) the unselective formation NHP‐H)MnH(CO) 6 ) via cooperative addition across Mn=P double bond. In other b R=Mes), was unobservable and reaction proceeded decarbonylation to dimeric species NHP) Mn (CO) 7 that isolated identified spectroscopically. Taking into account outcome further studies under various conditions absence presence both transformations can be explained context common mechanism involving as first step, different is attributable fact unreactive towards CO while not. DFT relate this divergence deviations molecular constitution stability arising from level steric congestion. Preliminary suggest /H well enable photo‐induced hydrogenation styrene ethyl benzene, even if possibly catalytic nature process remain yet unknown.
Язык: Английский