1. Novel Di- and Trinuclear Iridium Complexes Bridged by Various Bidentate Nitrogen Ligands
- Subjects
Iridium complexes ,Hydrido complexes ,Dinuclear complexes ,Trinuclear complexes ,^1H NMR spectra ,Crystal structures ,IR spectra ,Bidentate nitrogen ligands - Abstract
[Abstract] Reactions of Ir hydrido complex [Ir(H)_2(PPh_3)2(Me_2CO)_2]X (X＝PF_6, BF_4) with bidentate nitrogen ligands such as 3,6-di-2-pyridyl-1,2,4,5-tetrazine (dpt), 1,2-bis(4-pyridyl)ethylene (bpe), 4,4'-pyridyl disulfide (dps), 4,4'-trimethylenedipyridine (tmdp) in CH_2Cl_2 afforded various di- and trinuclear Ir hydrido complexes, [Ir_2(H)_4(PPh_3)_4(dpt)](PF_6)_2 (1), [Ir_2(H)_4(PPh_3)_4(bpe)_2](BF_4)_2 (2), [Ir_2(H)_4(PPh_3)_4(dps)_2](PF_6)_2 (3) and [Ir_3(H)_6(PPh_3)_6(tmdp)_3](PF_6)_3・3Me_2CO (4). Their structures and properties were characterized by IR, ^1H NMR and a single crystal X-ray analysis. In all the Rh hydrido complexes, the Rh atom is coordinated by two PPh_3 ligands in the trans-position and two nitrogen ligands in the cis-position. The remaining sites are occupied by two hydride atoms to form a saturated 18-electron framework in a slightly distorted octahedral geometry. Based on structural studies in solution and in the solid state, it was demonstrated that di- and trinuclear Ir hydrido complexes with bidentate nitrogen ligands were selectively produced depending on the structural feature of bridging ligands., 本文データの一部は、CiNiiから複製したものである。
- Published
- 2003