Fluxional motion

This complex is soluble in dichloromethane, chloroform, benzene, and acetone, and sparingly soluble in hexane and diethyl ether. The H NMR spectra of this complex indicate that the six-membered palladated 2-(2-pyridinylmethylJphenyl-C1, N moiety shows a fluxional motion above — 30 °C. In the low-temperature limiting spectrum measured in chloroform- at — 35 °C, the methylene protons are observed at S 4.45 as an AB quartet [Ad = 0.93, 2J(hh) = 14 Hz], which changes to a sharp singlet at S 4.51 in the high-temperature limiting spectrum at 55 °C. The cyclopalladated structure of the 2-(2-pyridinylmethyl)phenyl-C1, N moiety is confirmed by the fact that the aromatic protons appear as two sets of ABCD patterns at — 35 °C.7... 

The variable temperature C CP MAS and static NMR Using a combination of NMR methods we have detected and studied fluxional motions in the slip-sandwich structure of solid decamethylzincocene ([(ri5-C5Me5)Zn(rii-C5Me5)])and was compared with the solid iminoacyl derivative [([(t 5-C5Me5)Zn(rii-C(Nxyl)C5Me5)]. " ... 

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