A (salicylidene)aniline derived Schiff-base adduct of methyltrioxorhenium(VII)–Cis-and trans-coordination of the ligand

A series of chromophoric Lewis base adducts of methyltrioxorhenium (MTO) was examined. The ligands were pyridine derivatives with different size of the aromatic system and variable substituents, thus providing a variation of electronic and steric parameters. The complexes were fully characterised (UV/Vis, IR and NMR spectroscopy, single-crystal X-ray diffraction and elemental analysis) and their stability constants in dichloromethane were determined by means of UV/Vis spectroscopy. Moreover, this report presents a study of the influence of these N-donor ligands coordinated to MTO on the catalytic activity of epoxidation of 1-octene.

show abstract

“…Moreover, this conclusion is in accordance with previously reported data. [24] Figure 2. PLATON view of the solid-state structure of complex 8.…”

Section: X-ray Crystal Structure Of Ligand 5 and Complexes 8-14mentioning

confidence: 99%

Chromophoric Lewis Base Adducts of Methyltrioxorhenium: Synthesis, Catalysis and Photochemistry

et al. 2010

Self Cite

View full text Add to dashboard Cite

show abstract

“…Much efforts have been made to seek additives that can suppress the ring opening side reaction in low loading, while not promote the decomposition of MTO or its derivatives. It was found that some oxygen donor ligands can coordinate with MTO to form stable complexes [19,31,[33][34][35][36][37]; the complexes pre-prepared or generated in situ not only suppressed the ring opening side reaction, but also showed long lifetime compared to the cases with nitrogen donor ligands as additives in epoxidation of olefins. Moreover, in contrast to N-donor adducts, no pronounced ligand excess is necessary to achieve high yields and selectivity in olefin epoxidation catalysis.…”

Section: Introductionmentioning

confidence: 99%