162857-41-2Relevant academic research and scientific papers
M(CO)4 (M=Mo or W) complexes of 2,6-bis(methylthiomethyl)pyridine (L1) and 2,6-bis(p-tolylthiomethyl)pyridine (L2): a dynamic NMR study
Abel, Edward W.,Blackwall, Elizabeth S.,Creber, Michel L.,Heard, Peter J.,Orrell, Keith G.
, p. 83 - 88 (1995)
The hybrid S/N/S donor ligands 2,6-bis(methylthiomethyl)pyridine (L1) and 2,6-bis(p-tolylthiomethyl)pyridine (L2) react with the (M = Mo or W) compounds to form complexes of general formula (M = Mo, L = L2; M = W, L = L1 or L2), where both L1 and L2 act in a S/N bidentate chelate fashion.In solution, these complexes undergo three fluxional processes, viz. inversion at the coordinated S atom, S1-S2 switching, and combined inversion and S1-S2 switching, leading to an interconversion of the four possible permutational isomers.Energy barriers for all three processes have been evaluated by standard one-dimensional band-shape analysis techniques.The mechanism of the S1-S2 switch is discussed. Keywords: Molybdenum; Tungsten; Fluxionality; Nuclear magnetic resonance
