Molecular dynamics of N,N′-di-p-fluorophenyltriazenido complex of platinum (II)

The triazenide complex of Pt(II) trans-(o-Tol)Pt(PEt₃)₂N₃Ar₂(1) (Ar = p-FC₆H₄) was synthesized by reaction of (o-Tol)Pt(PEt₃)₂BF₄ with Ar₂N₃Na. The ¹H, ¹⁹F and ³¹P NMR spectra of this complex in toluene-d₈ were studied at different temperatures. Two kinds of dynamic processes were observed. The first one is the intramolecular N,N′ migration of the (o-Tol)Pt(PEt₃)₂ group, detected by ¹⁹F NMR. The second process, revealed by ¹H, ¹⁹P NMR, is the rotation around the partially double N(2)–N(3) bond. Thermodynamic parameters for these processes were calculated from dynamic NMR spectra.