36100-13-7Relevant academic research and scientific papers
Kinetics and Mechanism of Ring Closure for a Series of Photoproduced Intermediates (M = Cr, Mo, or W; L = Pyridine 2-Carbaldehyde Imine Ligand)
Chan, Lisa,Lees, Alistair J.
, p. 513 - 518 (2007/10/02)
Light irradiation of a solution of (M = Cr, Mo, or W) in the presence of a pyridine 2-carbaldehyde imine ligand 2-C5H4NCHNR (L; R = Ph, But, Bun, or Pri) produced a transient complex , in which the normally bidentate ligand is co-ordinated in a monodentate fashion.The photoproduced complex complex subsequently extrudes CO thermally to form a bidentate product ; this process is relatively slow and its time-dependent behaviour has been monitored with a diode-array u.v.-visible spectrophotometer for each of the ligands L.Kinetic data obtained for these chelation reactions indicate that the pyridine nitrogen atom in L preferentially scavenges the photoproduced intermediate.Rate and activation energy parameters closely relate to the nature of the ligand L and imply varying degrees of associative character in the ring-closure transition state.
