Synthesis and reactivity studies of cyclopentadienyl bis(triphenylphosphine)osmium(II) complexes. Crystal and molecular structure of [CpOs(PPh3)(phen)]BF4

Add time:08/10/2019    Source:sciencedirect.com

Reaction of [CpOs(PPh3)2Br] (1) with acetonitrile ligand or monodentate anions yielded complexes of the type [CpOs(PPh3)2(CH3CN)]+ (2), [CpOs(PPh3)2X], X=CN (3) and NCS (4). Treatment of 1 with NaNO2–HCl in the presence of NH4BF4 yielded the dicationic complex [CpOs(PPh3)2(NO)](BF4)2 (5). Reactions of the complex [CpOs(PPh3)2(CH3CN)]BF4 (2) with chelating ligands L2 yielded cationic complexes of the type [CpOs(L2)(PPh3)]BF4, where L2=2,2′-bipyridine (bipy) (6), 1,10-phenanthroline (phen) (7). These compounds were characterized by 1H NMR, 31P NMR and IR spectral data. The X-ray crystal structure of the complex [CpOs(PPh3)(phen)]BF4 has been determined.

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