Crystal Structure and Dynamic Behavior of a New Class of Monocationic Organometallic PdII Compounds with Two Molecules of Bidentate Ligands: [Pd(L–L)(N–N)(CH2NO2)][PF6] (L–L = N–N, dppp)
✍ Scribed by Barbara Milani; Gianni Corso; Ennio Zangrando; Lucio Randaccio; Giovanni Mestroni
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 348 KB
- Volume
- 1999
- Category
- Article
- ISSN
- 1434-1948
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✦ Synopsis
Two new classes of organometallic palladium(II) compounds, solution, investigated by NMR spectroscopy, shows the presence of dynamic processes involving only the N-N namely [Pd(N-N)(CH 2 NO 2 ) 2 ] and [Pd(L-L)(N-N)(CH 2 NO 2 )]-[PF 6 ] [N-N = 2,2Ј-bipyridine, 1,10-phenanthroline and their molecules. This fluxional behavior is different for [Pd(N-N) 2 (CH 2 NO 2 )][PF 6 ] and [Pd(dppp)(N-N)(CH 2 NO 2 )][PF 6 ]: in the substituted derivatives; L-L = 1,3-bis(diphenylphosphino)propane or N-N] have been synthesized and fully former it most likely involves the substitution of the nitrogen atom trans to the CH 2 NO 2 moiety by the uncoordinated characterized both in the solid state and in solution. The crystal structures of [Pd(phen) 2 (CH 2 NO 2 )][PF 6 ] and of [Pd(dppp)-nitrogen atom of the other N-N ligand; in the latter it may involve the exchange of the two nitrogen atoms at the same (tmphen)(CH 2 NO 2 )][PF 6 ] show a square-planar coordination geometry for the palladium atom and an unexpected coordination site (flipping). monodentate coordination for the N-N ligand. The behavior in merization mechanism was reported by Elsevier and Vri-Synthesis of the Complexes [Pd(N؊N)(CH 2 NO 2 ) 2 ]
Brookhart, [8] while the influence of NϪN in the first and (1؊5) and [Pd(L؊L)(N؊N)(CH 2 NO 2 )][PF 6 ] (6؊11) successive insertion steps of CO and alkenes in the copoly-The synthesis of the new series of organometallic Pd II [a