Stereoisomers and functional groups in oxidorhenium(v) complexes: effects on catalytic activity

Abstract

Stereo-control and effects on the catalytic activity of oxidorhenium(v) complexes in epoxidation and perchlorate reduction catalysis.

Structural and Electronic Control of the Bidentate 1‐(2‐pyridyl)benzotriazole Ligand in Copper Chemistry with Application to Catalysis in the A3 Coupling Reaction

“…This can be attributed to the fact that complex 6 is stable and forms a very stable {Cu II (bpy) x (HC≡CPh) y } + species, which prevents alkyne activation. Given the short reaction time (2 h), these results indicate that the stereochemistry of the precatalyst during the catalytic process is a parameter that should be taken into account, which is in line with literature evidence [29, 30] . Given that even 1 mol % of precatalyst 1 still performs well, whereas the other Cu II salts have been reported to perform poorly at this concentration (Table 4, entry 8), [19] this rules out full ligand dissociation in 1 but favours the formation of a stable Cu I complex that possibly is the active catalytic species.…”

Green solvent free epoxidation of olefins by a heterogenised hydrazone-dioxidotungsten(vi) coordination compound

“…This matter can be attributed to the high trans influence of the oxido groups which elongates these bonds. 22 By considering the elimination of phenolic and amidic hydrogen atoms during the coordination of ligand to the metal ion, it is obvious that the hydrazone ligand acts as a dianionic ligand (L 2− ) in the iminol form. The C8–N2 and C8–O1 bonds are 1.329(9) and 1.337(8) Å, respectively which are close to the bond lengths of coordinated hydrazone ligands in the iminol form.…”