ISSN:
1434-1948
Keywords:
Palladium
;
N ligand
;
P ligand
;
Copolymerization
;
Chemistry
;
General Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Two new classes of organometallic palladium(II) compounds, namely [Pd(N-N)(CH2NO2)2] and [Pd(L-L)(N-N)(CH2NO2)][PF6] [N-N = 2,2′-bipyridine, 1,10-phenanthroline and their substituted derivatives; L-L = 1,3-bis(diphenylphosphino)propane or N-N] have been synthesized and fully characterized both in the solid state and in solution. The crystal structures of [Pd(phen)2(CH2NO2)][PF6] and of [Pd(dppp)(tmphen)(CH2NO2)][PF6] show a square-planar coordination geometry for the palladium atom and an unexpected monodentate coordination for the N-N ligand. The behavior in solution, investigated by NMR spectroscopy, shows the presence of dynamic processes involving only the N-N molecules. This fluxional behavior is different for [Pd(N-N)2(CH2NO2)][PF6] and [Pd(dppp)(N-N)(CH2NO2)][PF6]: in the former it most likely involves the substitution of the nitrogen atom trans to the CH2NO2 moiety by the uncoordinated nitrogen atom of the other N-N ligand; in the latter it may involve the exchange of the two nitrogen atoms at the same coordination site (flipping).
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
