191876-92-3Relevant academic research and scientific papers
Stereochemically non-rigid transition metal complexes of 2,6-bis[(1-phenylimino) ethyl]pyridine (BIP) Part 1. Dynamic NMR studies of [M(C6F5)2(BIP)](M = PdII or PtII)
Orrell, Keith G.,Osborne, Anthony G.,Sik, Vladimir,Da Silva, Mateus Webba
, p. 235 - 246 (1997)
The complexes [M(C6F5)2(BIP)] (M = PdII or PtII, BIP = 2,6-bis[(1-phenylimino)ethyl]pyridine) have been synthesised and characterised as involving BIP as a bidentate chelate ligand. In solution they undergo 1,4 metallotropic shifts of the M(C6F5)2 moiety, E,Z isomerisation of the pendant imine bond, and restricted C - C rotation of the pendant portion of the BIP ligand. 1H and 19F dynamic NMR studies yielded activation energies for these three types of fluxion. ΔG ≠ (298 K) values for the three processes were 89.6, 86.6 and 47.4 kJ mol-1 respectively for the PtII complex. Values for the PdII complex were significantly lower in magnitude, namely 71.6, 70.4 and 41.8 kJ mol-1 respectively.
