biostudies-literatureUnknownAssanar FIn an effort to investigate the cooperative activation of boranes, we have designed Os(iii) based paramagnetic mono- and bis-κ2-1,3-N,Se-chelated complexes, [Os(PPh3)2(κ2-N,Se-L)Cl2], 1 and [Os(PPh3)(κ2-N,Se-L)2(L')], 2-3 (L = C5H4NSe; 2: L' = Cl and 3: L' = κ1-Se-L). These complexes were synthesised by the thermolysis of [Os(PPh3)3Cl2] with the potassium salt of 2-selenopyridine, which also afforded a diamagnetic species, [Os(PPh3)2(κ2-N,Se-L)2], 4. A comprehensive study utilizing EPR spectroscopy, DFT calculations, and both photochChemical sciencehttps://www.ebi.ac.uk/biostudies/studies/S-EPMC12704654biostudies-literatureCooperative borane activation by tuning hemilability of different Os-κ2-N,Se-chelated complexes.PMC12704654Assanar FPatel DKGayen SGhosh SPradeep TfalseCooperative borane activation by tuning hemilability of different Os-κ2-N,Se-chelated complexes.In an effort to investigate the cooperative activation of boranes, we have designed Os(iii) based paramagnetic mono- and bis-κ2-1,3-N,Se-chelated complexes, [Os(PPh3)2(κ2-N,Se-L)Cl2], 1 and [Os(PPh3)(κ2-N,Se-L)2(L')], 2-3 (L = C5H4NSe; 2: L' = Cl and 3: L' = κ1-Se-L). These complexes were synthesised by the thermolysis of [Os(PPh3)3Cl2] with the potassium salt of 2-selenopyridine, which also afforded a diamagnetic species, [Os(PPh3)2(κ2-N,Se-L)2], 4. A comprehensive study utilizing EPR spectroscopy, DFT calculations, and both photoch2025-01-01T00:00:00Z2025 Dec2026-06-07T05:09:58.459Z2026-06-07T03:07:32.894ZS-EPMC127046544140345810.1039/d5sc06346a